KR960005027B1 - Manufacturing process of dump link and dump link structure - Google Patents

Abstract

preparing a flange produced by winding yarn containing resin; charging the flange with urethane or glass bubble after fixing a hot-pressed side panel(5) on a side of the flange(7) and joining the side panel with the other side; forming using vacuum bag after winding tape around the flange and the side panel. The dump link obtained by the method has less weight and easy to exchange and assemble.

Description

Manufacturing method and structure of composite material structure for dump link of loader

1 is an overall side view of a conventional roder showing a portion of a dump link.

2 is a perspective view of a composite structure for a dump link according to the present invention.

3 (a) to 3 (d) is an exploded perspective view of the composite structure for a dump link of the present invention, 3 (a) is a side panel, 3 (b) is a bushing holder, a third (c) Is a schematic illustration of a flange and a third (d) winding box.

4 is a cross-sectional perspective view taken along the line A-A of FIG.

* Explanation of symbols for main parts of the drawings

1: Bucket 2: Dump Link

3: boom 4: bell crank

5: side panel 6: bushing holder

7: flange 8: winding box

9: composite material 10: box structure

The present invention relates to a method for manufacturing a composite material structure that can be used in a dump link, which is part of a rodda's work tool, and a structure thereof, which can be manufactured in a simple process compared to a dump link made of conventional structural steel, while having a high strength. Strong, unloaded; The present invention relates to a method for manufacturing a composite structure for dump links of a loader, and a structure thereof, which can be reduced to improve work performance, improve equipment stability, and are easy to assemble and replace.

The weight reduction of the work tool is one of the important factors influencing the improvement of the work performance and the stability of the loader, and the conventional work tool parts are made of a high specific gravity metal structure, and thus there is a limit to reducing the weight while satisfying the design strength condition. Especially in the case of dump link, it is the structure that is the main one-way load of tensile compression according to the characteristics of the link, and the strength in the vertical direction of load is not necessary much, but it has the great strength due to the isotropy and shape characteristics of the metal material. It had to be over designed.

Thus, the inventors of the present invention, in order to solve the problems of the conventional dump link (Korean Patent Application No. 91-10418 (filed June 22, 1991, the name of the invention: Excavator for the excavator made of polymer composite material and The method of manufacture thereof, hereinafter referred to as "prior application", is somewhat modified in the rudder link of the present invention to complete the invention. The preceding patent application has been used as a number of references in the present invention.

Accordingly, it is an object of the present invention to provide a method for producing a composite structure for a dump link composite structure of a loader that has sufficient strength and reduced weight to improve work performance and equipment stability, and to easily assemble and replace. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an overall side view of a conventional loader showing a dump link portion, FIG. 2 is an enlarged perspective view showing that the dump link 2 of FIG. 1 is composed of a composite material according to the present invention, and FIG. 3 (d) are exploded perspective views before final assembly of the dump link according to the present invention, and FIG. 4 is a cross-sectional perspective view taken along line AA of FIG. 2 of the present invention.

According to these drawings, the method of manufacturing the dump link structure of the present invention, after fixing the bushing holder (6) in which the bucket (1) and the bell crank (4) is connected to the dump link (2) in the desired position, and then the filament or It is wound with a resin impregnated fiber by a tape winding method, the bushing holder 6 is wrapped with a second tile with a manufactured flange 7, and one of the side panels 5 is bonded to one side of the flange, It is filled with urethane or glass bubble inside, then another side panel is bonded to the other side, and the winding box 8 is wound by tape winding method, and then molded into a bag bag (Vaccum Bag or Baccum forming). It is composed.

In the above, for the overall uniform shape, a step between the winding box 8, the flange 7, and the side panel 5 may be smoothed with short fiber reinforced resin.

It is another object of the present invention to provide a composite structure for a dump link of a loader.

The composite material structure for a dump link of the present invention is a bushing holder (6) in which the bucket (1) and the bell crank (4) is connected to the dump link (2), the bushing holder is inserted therein and a urethane or glass bubble foam therein. It consists of a box-like structure (10) filled with (9), the box-like structure consists of a flange (7) and two side panels (5) surrounding the bushing holder, the box-shaped structure is a winding box (8) ) So that the flange 7 and the side panel 5 are integrated without being separated.

The flange 7 is manufactured by a filament or a tape winding method, which serves to play a role of tensile load and bending moment, and the side panel 5 may be formed by a hot press method, which is a compression load. The winding box 8 may be manufactured by a manufacturing process of the flange, that is, a filament or tape winding method, which separates the flange 7 from the side panel 5. Prevents and accepts torsional loads.

In addition, the bushing holder 6 is a portion where the bucket 1 and the bell crank 4 are connected to the dump link 2, and is made of a metal material, but when the thickness thereof is difficult to support the required strength, the filament or the tape winding The method is reinforced around it and bonded to the box-shaped structure of the link using an adhesive such as epoxy. The urethane or glass bubble foam 9 is used as a base for supporting the box-shaped structure 10 that surrounds it in a square beam shape and also serves as a filler for absorbing shock from the outside.

The box-shaped structure may be laminated by changing the thickness of each part to withstand the work load on the outside of the urethane or glass bubble foam (9) in which the bushing holder (6) is inserted, the fiber material used is glass fiber As resin and resin, an epoxy resin is preferable and a filament or a tape winding method and a hot press method are used.

Hereinafter, the manufacturing method of the present invention will be described in detail through examples. However, the following examples do not limit the scope of the present invention.

Example 1

The method described in Example 1 of the preceding application is used, that is, a Nippon Carbion Co. Z 303 LBO (tensile strength: 400kgf / mm2, modulus of elasticity 50msi) was impregnated into unsaturated polyester resin or vinyl ester resin for room temperature curing, and then densely wound using a filament winding machine manufactured by Korea Institute of Machinery and Materials, followed by natural curing. . At this time, the winding conditions were 10kgf tensile force and 90 ° winding hoop winding method (Hoop Widing) was used, the curing conditions were naturally cured for 3 hours at room temperature (25 ℃).

After fixing the bushing holder, the glass fiber is impregnated with epoxy resin and wound by a conventional tape winding method to produce a flange, and then wrapped in the fixed bushing holder, and then a side panel manufactured by using a hot press method. After manufacturing and fixing to one side to form a mold, and filling the mold with 70 to 80% of the volume of the final dump link, another side panel is bonded, and then wound the winding box by the tape winding method, A conventional back bag method was subjected to final molding to prepare a dump link composite material of the present invention.

As a result, the manufactured dump link has a weight reduction effect of about 60% by 34 kg, compared to 85 kg of the conventional metal material link. The weight reduction improves the work performance of the working apparatus by about 3% or more and improves the stability of the equipment. It is increased by 2% or more, and as the weight of the link is reduced, assemblability and exchange can be considerably easy.

Claims (5)

After fixing the bushing holder (6) to which the bucket (1) and the bell crank (4) are connected to the dump link (2) at a desired position, the flange is manufactured by winding the fiber impregnated with resin by a filament or a winding method. step ; Fixing the side panel 5 manufactured by a hot press method to one side of the flange 7, and then filling the inside with urethane or glass bubbles, and bonding the side panel to the other side; And winding the flange and the side panel by a tape winding method to form a Vacum Bag method. A bushing holder 6 having a bucket 1 and a bell crank 4 connected to the dump link 2, a box-shaped structure in which the bushing holder is inserted and filled with a urethane or glass bubble foam 9. A composite material structure for a dump link, characterized in that consisting of 10). The composite structure for a dump link according to claim 2, wherein the box-shaped structure is composed of a flange (7) and two side panels (5) surrounding the bushing holder. 3. The composite material structure for a dump link according to claim 2, wherein the box-type structure contains a winding box so that the flange and the side panel are not separated. 3. The composite material for a dump link according to claim 2, wherein the structure of the box-shaped structure is laminated by varying the thickness of each part so as to withstand the work load on the outside of the urethane or glass bubble foam 9 filled therein. Material structures.