Method of manufacturing enhanced teeth of dipper bucket of shovel
a technology of dipper bucket and elongated teeth, which is applied in the field of manufacturing enhanced teeth of dipper bucket of shovel, can solve the problems of elongated teeth being prone to breakage, prone to damage in the dipper bucket b>1/b>, and both prior art dipper buckets suffered from disadvantages, etc., and achieves less brittleness, sufficient hardness, and more ductility.
Inactive Publication Date: 2005-09-29
RONG SHING IRON FACTORY
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- Abstract
- Description
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Benefits of technology
[0006] It is an object of the present invention to provide a process of manufacturing a tooth of a dipper bucket of a shovel, the tooth having a larger joining portion coupled to the dipper bucket and a sharp portion, the process comprising cooling the molded tooth in a furnace at about 920° C., suddenly cooling the tooth in a fluid contained in the furnace, heating the tooth at about 460° C., slowly cooling the tooth in the air, supporting the tooth in the furnace with the joining portion immersed in the fluid and the sharp portion exposed in the air, and producing the finished tooth. The present invention has the advantages that the teeth are less brittle and more ductile while having a sufficient hardness, the teeth can dig further into earth for increasing load of the dipper bucket per shovel, and the teeth are durable.
Problems solved by technology
Conventionally, the dipper bucket 1 is susceptible of damage due to frequent use.
Unfortunately, the dipper bucket 1 has to be replaced with a new one once the teeth 101 are damaged.
However, both prior art dipper buckets suffered from a disadvantage as illustrated in FIG. 3.
However, elongated teeth tend to break due to insufficient structural strength.
Method used
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[0017] Referring to FIG. 4, a tooth 10 of dipper bucket 2 of a shovel to be manufactured by the invention is shown. The dipper bucket 2 is threadably secured to an arm 1. Also, the tooth 10 comprises a larger joining portion 11 coupled to the dipper bucket 2 and a sharp portion 12.
[0018] Referring to FIG. 5 in conjunction with FIGS. 6, 7 and 8, a process of manufacturing the teeth 10 of the dipper bucket 2 in accordance with the invention is illustrated. Steps of the process will now be described in detail below. In step A (quenching step), cool the molded tooth 10 in an electric furnace 30 at temperature about 920° C. for increasing its hardness. In step B (first cooling step), suddenly cool the tooth 10 in an oily fluid. In step C (first annealing step), heat the tooth 10 at temperature about 460° C. and then cool slowly to prevent brittleness. In step D (second cooling step), slowly cool the tooth 10 in the air. In step E (second annealing step), a support 20 at the bottom of th...
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Abstract
A process of manufacturing a tooth of a dipper bucket of a shovel is disclosed. The tooth has a larger joining portion coupled to the dipper bucket and a sharp portion. The process comprises cooling the molded tooth in a furnace at about 920° C., suddenly cooling the tooth in a fluid contained in the furnace, heating the tooth at about 460° C., slowly cooling the tooth in the air, supporting the tooth in the furnace with the joining portion immersed in the fluid and the sharp portion exposed in the air, and producing the finished tooth. The teeth are less brittle and more ductile while having a sufficient hardness. The teeth can dig further into earth for increasing load of the dipper bucket per shovel.
Description
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to the manufacturing of dipper bucket of shovel and more particularly to a method of manufacturing teeth of a dipper bucket of shovel with improved characteristics such as strengthened structure and improved ductility. [0003] 2. Description of Related Art [0004] A conventional dipper bucket 1 of shovel is shown in FIG. 1. Conventionally, the dipper bucket 1 is susceptible of damage due to frequent use. Particularly, teeth 101 of the dipper bucket 1 are susceptible of damage because the teeth 101 are frequently inserted into, for example, earth for lifting and removing the same. Unfortunately, the dipper bucket 1 has to be replaced with a new one once the teeth 101 are damaged. This is because the teeth 101 are integrally formed with the dipper bucket 1. [0005] Another conventional dipper bucket 1 of shovel is shown in FIG. 2. The dipper bucket 1, as an improvement of the one shown in FI...
Claims
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Login to View More IPC IPC(8): C21D8/00C21D9/00
CPCC21D9/00
Inventor KO, JUNG-CHING
Owner RONG SHING IRON FACTORY