WO2000043145A1

WO2000043145A1 - Method for manufacturing dehydration adjustment holder of washing machine

Info

Publication number: WO2000043145A1
Application number: PCT/KR2000/000037
Authority: WO
Inventors: Sangrak Son
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-01-23
Filing date: 2000-01-20
Publication date: 2000-07-27
Anticipated expiration: 2001-07-23
Also published as: AU2328200A; KR100296674B1; KR19990068273A

Abstract

A method for manufacturing a dehydration adjustment holder of a washing machine, comprising: a trimming and first molding working (A) for simultaneously shaping a center protrusion, a wing connected to the center protrusion, and a depression in the interior of the wing; a correction process (B) for making an upper surface of the wing to be flat while repeating diameter diminishment working and depth hardening working of the protrusion; a process (C) for making a penetrating space at the center of the protrusion while cutting and removing unnecessary edge of the diameter of the wing according to selected size; a wing correction process (D) for molding and constructing a hole (a) and a cutting unit-groove of the conventional wing; a recorrection process (E) for vertically making a protrusion portion at an end of the penetrating space, to be flattened; and, a final cleaning and painting process (E).

Description

METHOD FOR MANUFACTURING DEHYDRATION ADJUSTMENT HOLDER OF WASHING MACHINE

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a washing machine, and more particularly, to a method for manufacturing dehydration adjustment holder of the washing machine.

2. Description of the Related Art

The prevent invention is made so as to cheaply produce products having good quality in large quantities with press working which breaks from a prior art forging working.

A dehydration holder of a washing machine is coupled to a dehydration body as a shaft in the bottom of the dehydration body to thus be driven, as shown in FIG. 2 showing a method a holder according to the prior art, with hot forging working.

Namely, the prior art forging working is sequentially executed with material cutting working 10, heating working 20, first forging working 30, t-±riming and edge cutting working 40, reheating working 50, and second forging working 60, and machinelikely executed with shorting -blasting 70 for stripping oxidation skin surface generated due to the forging workings, plating working 80, shaft hole cutting process working 90 for coupling the shaft of the dehydration body. Also, it is finally executed with edge cutting working 100 by the molding.

That is, it takes much time and much electrical power to molding with heating the material as stated above. Further, because the molding working has the problem in that an end (edge) of protrusions become thin in case of changing the quality of the material, however the forging working has now been unavoidably performed as measure for easily changing the quality of the material.

Especially, now that the forging working is not performed in a first time, it is repeated in two times. At this point, operation efficiency is deteriorated due to ihanu workings of inserting heated material into the molding frame with tweezers by ones and stripping perfected products from the molding frame, thereby generating urgency of fire generation.

The edge cutting working 50 performed prior to the second forging working 60 is necessarily required because the edge of the product made from the first forging working 40 is irregular and has problems such as environment pollution and the urgency in the health of workers, as the working for stripping oxidation skin surface of the material generated after forging working in the shorting-blasting 70 following the second forging working. Because the shaft hole process working 90 as machinelikely performed is divided into first and second forging workings, the prior art has problem in that the shaft hole process working 90 takes much time to be performed and the precision of the size is varied depending on the worker's skill.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of this invention, many of the attendant advantages thereof, will be readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings, in which like reference symbols indicate the same or similar elements components, wherein,

FIG. 1 is a view showing a method for manufactuiing a holder according to the present invention; and,

FIG. 2 is a view showing a method for manufacturing a holder according to the prior art.

SUMMARY OF THE INVENTION

It is therefore an object of the present invention for solving the above problem to provide a method for manufacturing a dehydration holder of a washing machine with press molding working stripped from the forging working of the prior art, thereby generating good operation efficiency, price cutting of the product due to production in large quantities, and excellent precision.

The above object can be achieved according to the present invention with a method for manufacturing a dehydration adjustment holder of a washing machine, including: a trimming and first molding working A for simultaneously shaping a center protrusion, a wing connected to the center protrusion, and a depression in the interior of the wing; a correction process B for making an upper surface of the wing to be flat while repeating diameter diminishment working and depth hardening working of the protrusion; a process C for making a penetrating space at the center of the protrusion while cutting and removing unnecessary edge of the diameter of the wing according to selected size; a wing correction process D for molding and constructing a hole a and a cutting unit-groove of the conventional wing; a recorrection process E for vertically making a protrusion portion at an end of the penetrating space, to be flated; and, a final cleaning and painting process E.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Hereinafter, a preferred embodiment of the present invention will be in detail explained with reference to the accompanying drawings.

A center protrusion 1, a wing 2 connected to the above center protrusion 1, a depression 2a in the interior of the wing 2 are simultaneously shaped through trimming working of the cut material in the molding and a first molding process A. The molding state is similar to that of a hat.

While reducing the diameter of the protrusion 1 with the molding, the depth of the protrusion 1 becomes deep and the molding process of the wing 2 is performed to horizontally and precisely rotate the dehydration body. Next, the above workings are again repeated in two times and a correcting process B to flatly cast an upper surface 1' of the protrusion 1 and to edgily cast the edge in selected sizes, and a process C to shape a shaft tube by making the penetrating space 2' at the center of the protrusion 1 are performed.

Following that, a wing correction process D for forming a hole a and cutting unit-groove b as necessary construction elements of the wing 2 of the above molded product is performed with the molding, a recorrection process E for vertically making a protrusion portion la remained in cut state, in the end of the protrusion 1 generated upon molding the penetrating space 2' in the process C, to be flated, and a conventional cleaning and painting process F are performed sequentially, thereby producing perfected products.

All processes of the present invention are performed with press molding working. Namely, the prior art forging working is selected for preventing the dirninishment of the pressure force at the shaft because the penetrating space 2', or, the end of the shaft tube is increased to be thin with the molding process and accordingly, terminals are open upon assembling the shaft. However, the process according to the present invention is executed as an up setting process of hardening the diameter of the upper surface 1' of the protrusion 1 as a measure including a hardening process.

The tii-T-ming and first molding process A applies the pressure to the metal plate (material) supplied therein with the molding and molds a fundamental structure having the protrusion 1 and the wing 2. Also, the correction process B is performed as a previous process for molding the fundamental structure, with repeating diameter diminishment working and depth hardening working of the protrusion 1 depending on the selected requirements. The above repeating workings are performed by considering the phenomenon of rapidly making the thickneee of the protrusion to be thin to thus be cracked in the case of suddenly climi-nishing the diameter of the protrusion 1. Further, since the up setting process is performed with trimming the upper surface 1' of the protrusion 1, the upper surface 1' is finally molded to be flat. This is shown in the correction process of the diagrams of the present invention.

The process C is executed with making the penetrating space 2' at the center of the protrusion 1 with the molding and forming the shaft tube for coupling the rotation shaft of the dehydration body, while cutting and removing unnecessary edge of the diameter of the wing 2 according to the selected size. In this case, since it is not easy to perform the process C in the event that the diameter of the molding is equal to that of the penetrating space 2' upon molding the penetrating space 2', the molding having the diameter less than that of the penetrating space 2' is used in the process C, so that the protrusion portion la can be remained to be coupled and cut to the end of the interior of the penetrating space 2'. However, the protrusion portion la is corrected with recorrection process E as will be described hereinafter. The above state become the fundamental structure having the fundamental configuration and the construction elements of the present invention.

Therefore, the wing correction process D molds and constructs the hole a and a cutting unit-groove b as necessary elements of the conventional wing 2 in the above fundamental structure. Also, the recorrection process E according to the present invention vertically can finally obtain the perfected products through the conventional cleaning and painting process while making a protrusion portion la generated upon molding the penetrating space 2' in the process C, to be flated and makes the coupling of the shaft to be intimate with each other.

As may be apparent from the foregoing, the present invention has advantages in that the price of the product can be remarkably lowered as production in large quantities and the generation of inferior goods can be decreased with molding at the exact size because the repeating workings can be performed with adapting not the conventional forging working but the press molding working. As well, the size of the penetrating space 2' is exactly made with precision process, thereby maintaining good reliability of the product. Likewise, the present invention is for applying the pressure with using the metal plate, thereby contributing the production in large quantities and price cutting.

While there have been illustrated and described what are considered to be preferred embodiments of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made, and equivalents may be substituted for elements thereof without departing from the true scope of the present invention. In^" addition, many modifications may be made to adapt a particular situation to the teaching of the present invention without departing from the central scope thereof. Therefore, it is intended that the present invention not be limited to the particular embodiments disclosed as the best mode contemplated for carrying out the present invention, but that the present invention includes all embodiments falling within the scope of the appended claims.

Claims

WHAT IS CLAIMED IS:

1. A method for manufacturing a dehydration adjustment holder of a washing machine, comprising: a trimming and first molding working A for simultaneously shaping a center protrusion, a wing connected to said center protrusion, and a depression in the interior of the wing; a coπrection process B for making an upper surface of said wing to be flat while repeating diameter diminishment working and depth hardening working of said protrusion; a process C for making a penetrating space at the center of said protrusion while cutting and removing unnecessary edge of the diameter of said wing according to selected size; a wing correction process D for molding and constructing a hole a and a cutting unit-groove of said conventional wing; a recorrection process E for vertically making a protrusion portion at an end of said penetrating space, to be flated; and, a final cleaning and painting process E.