KR20110121067A

KR20110121067A - Weight for heavy equipment using ductile cast iron housing and manufacturing method thereof

Info

Publication number: KR20110121067A
Application number: KR1020100040492A
Authority: KR
Inventors: 장택용
Original assignee: 경민웨이트(주)
Priority date: 2010-04-30
Filing date: 2010-04-30
Publication date: 2011-11-07

Abstract

PURPOSE: A weight for heavy equipment using a ductile cast-iron housing and a method of manufacturing the same are provided to reduce costs by 70% than when the weight is entirely manufactured from cast-iron since the weight for heavy equipment has a large specific gravity and low price. CONSTITUTION: A weight for heavy equipment using a ductile cast-iron housing comprises a housing(10) and a filling material(20). The housing is formed from ductile cast iron. The housing comprises a plurality of grooves(13) to mount a weight to heavy equipment. The filling material is filled in the housing. The filling material is formed with a mix of iron scrap of 90~97weight%, cement of 3~10weight%, and water.

Description

Weight for heavy equipment using ductile cast iron housing and manufacturing method

The present invention relates to a heavy equipment weight using a ductile cast iron housing and a manufacturing method thereof, and more particularly, to a ductile cast iron as a counterbalance in order to maintain the stability of the vehicle body in operation behind the body of heavy equipment such as excavators and forklifts. It relates to a heavy equipment weight using a ductile cast iron housing and a method for manufacturing the same, by filling a heavy weight inside the housing made, heavier than other weights of solid and equal volume, so that heavy equipment can work in a stable posture.

Excavator is a construction machine that carries out excavation work for digging ground in construction site such as civil engineering or construction, loading work for carrying earth and sand, shredding work for dismantling the building, and stopping work to clean up the ground. Install and use the proper work tool according to the condition of the rock and the type and work of the rock. For example, for general excavation and earth and sand transportation, a bucket is attached to the tip of the excavator's boom arm, and in general, to load one ton of soil or rock into the bucket of the excavator, 4 to 5 tons of counter balance (counter balance or counter weight) is installed at the rear.For forklift, it is 2 to 3 tons at the rear of the body to carry 1 ton of object with fork. It is equipped with counter balance.

In this way, the counterbalance that is installed for the stability of the vehicle body is installed on the vehicle body. Therefore, when the volume increases, the size of the vehicle body has to increase, and if the counterbalance can be made, the volume should be made smaller, so heavy weights should be used. Since heavy equipment works in places with poor working conditions, such as construction sites, narrow factories, or warehouses, the exterior of the counterbalance is damaged due to being hit or broken by other objects or facilities during work, and it is unsightly when it is severe. It is often the case that some parts fall off and cannot function properly as counterbalances.

In particular, when the surface of the counter balance is made of glass fiber reinforced plastic (FRP), the surface of the counter balance is easily broken by being bumped or stamped, and when the housing is made of ordinary steel plate, it is not robust and develops a new model. The initial mold investment costs are high, and in order to reduce the volume of the counterbalance, when the entire steel is made of heavy steel such as cast iron, the volume is reduced, but there is a problem of enormous cost.

The present invention has been made to solve the above problems, an object of the present invention, in mounting a heavy object with a counterbalance in order to maintain the stability of the vehicle body during operation in the rear of the body of heavy equipment such as excavators and forklifts, It is made of silver ductile cast iron, and inside it is filled with a large amount of waste material such as iron scrap, which is agitated and filled with cement, making it heavy and inexpensive. It is to provide a heavy equipment weight using a cast iron housing and a method of manufacturing the same.

Heavy duty weight using a ductile cast iron housing according to the present invention for solving the above problems, the housing formed of cast iron ductile cast iron as a raw material, 90 to 97% by weight of iron scrap and 3 to 10% by weight of cement It is composed of a filler that is mixed and stirred by adding water to the inside of the housing by stirring, it is characterized in that one side of the housing is formed with a groove for seating on the heavy equipment.

Preferably, a plurality of reinforcing bars or partitions are formed in the housing to reinforce the rigidity of the housing, and the iron scrap includes scrap, mill scale, scrap, scrap metal, etc., generated after machining. .

Method for producing a heavy equipment weight using a ductile cast iron housing according to the present invention comprises the steps of: manufacturing a housing with an open top of the ductile cast iron as a cast; Adding water to the filler mixed with 90 to 97% by weight of iron scrap and 3 to 10% by weight of cement to be stirred and added into the housing to cure; It is manufactured through the step of coupling the lid made of the same material as the housing to the upper portion of the housing cured the filler therein.

Heavy equipment weight using the ductile cast iron housing according to the present invention having the characteristics as described above, mounted on the rear of the body of the heavy equipment as a counterbalance for maintaining the stability of the vehicle body during operation, the housing of the weight is made of ductile cast iron raw material It is formed by casting, and only materials that are discarded, such as iron scrap, are selected and mixed with cement, mixed with cement and poured into the housing to cure and provide weight for heavy equipment with low specific gravity. As a result, it is possible to save about 70% in cost than when the entire weight is made of cast iron.

In addition, the weight of the present invention, because the housing material is used ductile cast iron, it is more durable than other cast iron or ordinary iron plate, which is strong in impact, and put the curing material mixed with iron scrap and cement in the housing as described above, the existing It has the resistance against impact strength of 2 ~ 4 times than the weight of the product, and because it is made of casting, it can produce complex appearance and sophisticated design, and the production cost is low because the initial mold cost is much lower than that of the steel plate housing. If only the shape of the housing is properly modified, it can be used for all heavy equipment such as excavators, forklifts, excavators and cranes.

1 is a view showing the weight for an excavator.
2 is a view illustrating a weight for a forklift truck.

In order for heavy equipment to maintain a stable posture during operation, heavy weights must be mounted as counterbalances on the rear of the body opposite the heavy equipment.In the case of excavators, the weight of the weight generally depends on the risk of working conditions. In the case of a forklift truck mainly working on a flat surface, a weight of about 2 to 3 times the lifting capacity of a fork is used. Therefore, the volume of weight is one of the important factors that determine the size of heavy equipment.

The weight of the present invention is composed of a housing 10 and a filler 20 filled therein, and one side of the housing 10 is provided with a plurality of grooves 13 for mounting the weight on heavy equipment. The housing 10 is filled with the filling material 20 therein in a state of being manufactured without casting the lid 11 at the top, and finally, the housing 10 in the upper portion of the housing 10 Cover the lid (11) with a steel plate of material and combined by a method such as welding to complete the weight to complete.

The housing 10 is made of ductile cast iron (spheroidal graphite cast iron) as a raw material, the thickness is preferably about 3-7 mm. If the thickness is thinner than 3mm, the surface may be torn or damaged by hitting other objects or facilities during the operation, and when the thickness is thicker than 7mm, the material cost increases, thereby increasing the manufacturing cost of the weight. Since the ductile cast iron is used in the housing 10, the filling and tensile strengths are much stronger and the manufacturing cost is lower than that of the steel plate housing or the general cast iron housing. In addition, since the housing is made of cast iron made of ductile cast iron, complex appearance and sophisticated design can be produced, and the mold cost of developing a new model is much lower.

The shape of the housing 10 varies depending on the heavy equipment to be mounted. The weight is formed on the surface on which the heavy equipment is mounted to form a groove 13 for mounting, and the opposite side is preferably flat or slightly rounded. The rear of the 10 may be formed with a plurality of grooves for mounting a muffler for exhausting various signal lights or exhaust gas, such as a direction indicator for guiding the driving direction of the heavy equipment, the housing (10) It is preferable to form a plurality of reinforcing bars or partitions 15 for reinforcing the rigidity of 10). The reinforcing bar may be in any form such as H-beam or I-beam.

The filler 20 is mixed with 90 to 97% by weight of iron scrap and 3 to 10% by weight of cement, added with water, stirred, and put into the housing 10 to cure. Iron scrap, mill scale, scrap, scrap metal, etc., generated after machining are used. The weight produced by filling the filler 20 inside the housing 10 has a specific gravity of about 4 to 5, which is less than the specific gravity of cast iron, but saves about 70% in terms of cost than using cast iron to produce the same weight. can do. In addition, although the filler 20 may be filled in the entire housing 10, the inside of the housing 10 may be divided into partitions 15 to be filled in only a portion thereof.

Method for manufacturing a heavy equipment weight using a ductile cast iron housing according to the present invention, the step of manufacturing a housing with an open top of ductile cast iron as a raw material, by adding water to the filler mixed with iron scrap and cement After stirring and putting into the housing to cure, through the step of bonding a lid made of the same material as the housing to the upper portion of the housing curing the filler therein by a method such as welding, the filler is made of iron 90 to 97 wt% of scrap and 3 to 10 wt% of cement are mixed and cured by adding water thereto.

By inserting and curing the filler mixed with iron scrap and cement in the housing as described above, it is possible to secure additional resistance against impact strength of about 330㎏ / ㎠, which is the general cement strength, compared to the weight of the existing empty form. Finally, the weight of the heavy equipment according to the present invention to cover the lid with an iron plate of the same material (ductile cast iron) of the same housing as the housing on the upper portion of the housing cured the filling material and to combine by welding or the like to complete the weight Has a force of 2-4 times the impact strength compared to the existing weight.

The above description is merely illustrative of the technical details of the present invention, and those skilled in the art to which the present invention pertains may various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10 housing 11 lid
13: groove 15: bulkhead
20: filling material

Claims

A housing formed of cast iron with ductile cast iron;
A filler which is mixed with 90 to 97% by weight of iron scrap and 3 to 10% by weight of cement, added with water, stirred, and poured into the housing to cure;
Consists of, the weight for heavy equipment using a ductile cast iron housing, characterized in that the groove is formed on one side of the housing for seating on the heavy equipment.

The method of claim 1,
The inside of the housing, the weight for heavy equipment using a ductile cast iron housing, characterized in that a plurality of reinforcement or partitions for reinforcing the rigidity of the housing is formed.

The method of claim 1,
The iron scrap is a heavy equipment weight using a ductile cast iron housing, characterized in that it comprises at least one of scrap metal, mill scale, shredding, scrap metal generated after machining.

The method of claim 1,
Weight of the housing using a ductile cast iron housing, characterized in that the thickness of 3 ~ 7mm.

Manufacturing a housing having an open upper portion as a raw material using ductile cast iron;
Adding water to the filler mixed with 90 to 97% by weight of iron scrap and 3 to 10% by weight of cement to be stirred and added into the housing to cure;
Coupling a lid made of the same material as the housing to an upper portion of the housing in which the filler is cured therein;
Method for producing a weight for heavy equipment using a ductile cast iron housing, characterized in that manufacturing through.