KR20040092749A - Manufacturing mathode of coupler for two tank type washing machine - Google Patents

Abstract

PURPOSE: A manufacturing method of a dehydrating tub coupler for a double tub-type washing machine is provided to enhance shock resistance and accuracy in the size by manufacturing the dehydrating tub coupler by a progressive method. CONSTITUTION: A manufacturing method of a dehydrating tub coupler for a double tub-type washing machine comprises a marking process of forming through holes and incision holes to predetermined positions of a material and setting up a reference position of a shaft connection part-formation part; a piercing process of cutting an excess part according to the reference position set through the marking process; a drawing process of forming the shaft connection part-formation part from a machined surface; a blanking process of cutting a circular support plate having incision grooves to the outer peripheral surface at uniform intervals from the material the drawing process of which is completed; a through-hole formation process of forming through holes at predetermined positions of the circular support plate; a burring process of forming a shaft insertion hole for inserting a shaft in the center of a shaft connection part from the circular support plate; and a shaft-forcible insertion process of inserting the shaft into the shaft insertion hole of the shaft connection part.

Description

Manufacturing method of dewatering tank coupler for two-stage washing machine {Manufacturing mathode of coupler for two tank type washing machine}

The present invention relates to a washing machine, and in detail, by manufacturing a dehydration tank coupler coupled to the lower part of the dehydration tank and connecting the rotating shaft of the dehydration motor by a progressive method using a press to increase impact resistance and dimensional accuracy, In order to improve the productivity, in particular, it is configured to be suitable for the manufacture of the coupler for the dehydration tank of the two-chamber washing machine.

In general, in the washing method of the domestic washing machine, the washing tank rotates in a state parallel to the ground, and the washing effect is generated by the impact of friction or drop with the inner wall of the washing tank while the laundry put into the washing tank rotates with water. The drum type washing machine and the washing machine of the washing tank rotate vertically from the ground, and the washing machine of the washing machine of the washing machine is wash | cleaned by the water flow formed in the process of rotating the pulsator inside a washing tank.

In the above washing machine, a pulsator washing machine is divided into a washing tank and a washing tank in which a washing and dehydration is performed in a single tank and a washing tank and a washing tank in a separate space. Compared to the breakfast washing machine, it has a simple configuration, and has a superior dehydration effect due to the high speed rotation of the dehydration tank.

The dehydration tank of the two-chamber washing machine as described above is usually configured by injecting a resin material for the lightweight construction while reducing the production cost.

On the other hand, when the rotating shaft of the motor is directly connected to the lower part of the dehydration tank, a strong shock is transmitted by sudden braking of the dehydration tank, and the rotating shaft connection part of the dehydration tank is damaged. Therefore, in the manufacture of a conventional dehydration tank, a coupler made of metal is inserted into the portion where the rotating shaft is connected. Appropriate strength is maintained by inserting by insert molding process.

At this time, the dehydration tank coupler as described above is continuous radially formed through holes (1A) and the cutting groove (1B) in the inner side of the support plate 1 made of a disk shape, as shown in Figure 1 In the center of 1) the shaft of rotation of the motor is made of a structure in which the shaft (5) to which the tip is connected vertically inserted.

The dehydration tank coupler 10 having the above-described structure is manufactured by die casting casting or the backing plate 1 embedded in the lower portion of the dehydration tank by aluminum, or by a forging method.

At this time, when the support plate 1 of the dehydration tank coupler 10 is formed by die casting using aluminum, impact resistance is deteriorated due to the characteristics of aluminum, so that each through hole 1A is repeatedly applied during the dehydration process. Or cracking or damage occurs around the incision groove 1B.

On the other hand, when the support plate 1 is manufactured by forging, the impact resistance can be improved, while the productivity is reduced, which requires a lot of manpower and cost. Occurs.

On the other hand, to solve the problems of the conventional method as described above, there is known a manufacturing method of the holder for washing machine dehydration tank disclosed in the domestic patent No. 296674, in the domestic patent No. 296674, such as by removing the forging method by a press By forming a backing plate, productivity is improved.

Korean Patent No. 296674 discloses an outer cutting and primary forming process of forming protrusions and wings as shown in FIG. 2; A process of reducing the diameter and depth of the protrusion and flattening the wing and smoothing the upper surface of the protrusion; A punching process for forming edge cutting and through holes; Wing punching correction process for forming a hole and the other cut portion in the wing; A recalibration process of flattening the projection of the inner circumference of the through hole; And washing and plating operations.

On the other hand, the dewatering tank coupler produced according to the above process is shortened the required process compared to the dewatering tank coupler produced by forging can increase the accuracy of the product compared to the forging.

However, the above-mentioned domestic patent No. 296674, while the number of processes is reduced compared to the manufacturing process of the dehydration tank coupler by forging, there is a problem such that the manufacturability is deteriorated since the semi-finished products formed by each process must be moved according to the post-process step. Follow.

In addition, since the interface between the support plate and the shaft insertion space is deformed during the formation of the shaft insertion hole, the precision decreases after the molding is completed, and accordingly, there is a problem of requiring a separate post-treatment process for flattening the support plate. A problem arises in that the thickness of the protrusion is varied depending on the position.

The present invention is to solve the conventional problems as described above, the technical problem of the present invention is coupled to the lower part of the dehydration tank of the two-chamber washing machine by a progressive method using a dehydration tank coupler for connecting the rotating shaft of the dehydration motor. By providing a way to increase the impact resistance and dimensional accuracy while improving the productivity of the product.

The technical problem of the invention as described above,

In the method of manufacturing a dehydration tank coupler for two-stage washing machine by the progressive method using a press,

A marking step of forming a through hole and an incision hole at predetermined positions of the material to set a reference position of the shaft connection part forming portion;

A piercing step of cutting the excess part according to the reference position set through the marking process;

A drawing step of forming a shaft connecting portion forming part from the processing surface from which the excess part is cut through the piercing process;

A blanking process of cutting a circular support plate having a cutout groove at equal intervals on an outer circumferential surface of the material from which the drawing process is completed;

A through-hole forming step of forming a through-hole at a predetermined position from the support plate on which the blanking process is completed;

A burling process of forming a shaft insertion hole into which a shaft is inserted in the center of the shaft connecting portion from the support plate on which the through hole forming process is completed;

It is achieved by providing a method for manufacturing a dehydration tank coupler for a dual type washing machine, characterized in that the shaft is inserted into the shaft insertion hole of the shaft connection portion.

Hereinafter, with reference to the accompanying drawings, the manufacturing method of the dehydration tank coupler for two-type washing machine according to the present invention will be described in detail.

1 is a perspective view showing an example of a dehydration tank coupler manufactured by die casting;

Figure 2 is a block diagram showing a manufacturing method of a conventional dehydrator coupler for two-type washing machine,

3 is a block diagram showing an embodiment of the present invention;

4 is a manufacturing flow diagram illustrating a molding process of the support plate according to the present invention;

5A, 5B, 5C, 5D, and 5E are cross-sectional views of shaft connections formed according to the respective drawing processes.

Figure 3 is a block diagram showing an embodiment of the present invention, Figure 4 is a manufacturing flow diagram showing an embodiment of the present invention, the manufacturing method of the dehydrating tank coupler for two-type washing machine according to the present invention using a press The dehydration tank coupler for two-stage washing machines is manufactured by the progressive method.

The present invention consists of a marking process, a piercing process, a drawing process, a blanking process, a through hole forming process, a burring process, and a shaft indentation process, and the drawing process is again a primary drawing process, a secondary drawing process, and a tertiary process. The support plate is composed of a drawing process, a fourth drawing process, and a fifth drawing process to form a dehydrating tank coupler for a dual type washing machine having a shaft connection portion.

In each of the above processes, the marking process is for setting a reference position at which the shaft connection part is formed, and the through hole 1 and the cutting hole at a predetermined position of the material from a rectangular steel sheet having a thickness of about 2 to 5 mm. 2) respectively.

In addition, after completion of the above-described process by cutting the excess portion 3 according to the reference position set through the marking process in the piercing process to reduce the rigidity of the material to enable a smooth drawing.

Subsequently, after completion of the piercing process described above, the shaft connection portion forming portion is formed from the processing surface from which the excess portion is cut through the drawing process.

At this time, in the drawing process, the diameter of the shaft connecting portion is formed to be larger than the design dimension, while the height of the shaft connecting portion is repeated repeatedly to prevent the thickness variation according to the position from the completed shaft connecting portion, and precise shape. It is possible to mold.

On the other hand, in the present embodiment, the drawing process for forming the shaft connecting portion is divided into five processes.

In the primary drawing process of the drawing process, the shaft connecting portion is formed to have a diameter of 280 to 300% with respect to the shaft connection diameter on the design dimension and a height of 55 to 60% with respect to the shaft connection height on the design dimension. Protrude upwards as shown.

Subsequently, in the secondary drawing process, the shaft connection portion is formed to have a diameter of 210 to 220% of the diameter of the shaft connection on the design dimension and a height of 75 to 80% of the height of the shaft connection on the design dimension as shown in FIG. 5B. Raise it up.

In addition, in the third drawing process, as shown in FIG. 5C, the diameter of the shaft connection part is 140 to 150% with respect to the diameter of the design dimension, and the upper part is pressed to form a height of 70 to 75% with respect to the height of the shaft connection part of the design dimension.

At this time, in the third drawing process, the height of the shaft connecting portion is shortened than the second drawing process by pressing the upper part so that the upper part of the protrusion forms a flat surface.

Subsequently, in the fourth drawing process, as shown in FIG. 5D, the shaft connection part of the material on which the third drawing process is completed has a diameter of 120 to 130% of the shaft connection part diameter in the design dimension, and 75 to the height of the shaft connection part design dimension. After the completion of the above process, the diameter and height of the shaft connection part are finally molded to match the design dimensions as shown in FIG.

On the other hand, in the embodiment of the present invention described above in the manufacturing process of the base plate using a steel sheet having a thickness of 2 to 5 mm by separating the drawing process in five steps as shown in Table 1 to prevent the thickness variation, for example, a thin thickness When manufacturing the support plate from the steel sheet of the material, the initial drawing height is set high and the drawing diameter is set small to reduce the number of necessary steps.

On the contrary, when the thick steel sheet is used as a material, the initial drawing height of the shaft connection portion is set low, while the drawing diameter is set large to enable smooth molding.

Subsequently, when the drawing process for forming the shaft connecting portion 5 is completed according to the above process, the cutting plate 6 is formed on the outer circumferential surface at equal intervals to separate the circular support plate 10 from the material. When the above process is completed, in the through hole forming process, the through hole is formed at a predetermined position from the support plate on which the blanking process is completed.

In addition, when the through-hole forming process is completed according to the above process, the burring process forms a shaft insertion hole 5A into which the shaft is inserted by cutting the center of the shaft connecting portion of the supporting plate into a circular shape, and after completion of the above process, the shaft connecting portion The shaft is inserted into the shaft insertion hole of the two-component washing machine dehydration tank coupler to manufacture.

On the other hand, the dehydration tank coupler is manufactured according to the above process is subjected to a post-treatment process such as heat treatment or plating after washing according to the specifications of the product.

As described above, the present invention is produced by the progressive process using a press to produce a dehydration tank coupler coupled to the lower part of the dehydration tank to connect the rotating shaft of the dehydration motor, the whole process is made on the working process within the same working radius, the productivity of the product It can increase.

In addition, the manufacturing method of the dehydration tank coupler for two-type washing machine according to the present invention can be divided into step by step drawing process for the formation of the shaft connection to prevent the dimensional change of the shaft connection after completion of molding and at the same time can significantly increase the dimensional accuracy There are many effects.

While the invention has been shown and described with respect to certain preferred embodiments, the invention is not limited to the embodiments described above, it is common in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Anyone with knowledge will be able to make various variations.

Claims (7)

In the method of manufacturing a dehydration tank coupler for two-stage washing machine by the progressive method using a press, A marking step of forming a through hole and an incision hole at predetermined positions of the material to set a reference position of the shaft connection part forming portion; A piercing step of cutting the excess part according to the reference position set through the marking process; A drawing step of forming a shaft connecting portion forming part from the processing surface from which the excess part is cut through the piercing process; A blanking process of cutting a circular support plate having a cutout groove at equal intervals on an outer circumferential surface of the material from which the drawing process is completed; A through-hole forming step of forming a through-hole at a predetermined position from the support plate on which the blanking process is completed; A burling process of forming a shaft insertion hole into which a shaft is inserted in the center of the shaft connecting portion from the support plate on which the through hole forming process is completed; And Method of manufacturing a dehydration tank coupler for a dual-type washing machine characterized in that the shaft is inserted into the shaft through the shaft insertion hole of the shaft connection portion. The method of claim 1, wherein the drawing process comprises: a primary drawing process of projecting the shaft connecting portion forming portion upward; A secondary drawing process of reducing the diameter of the shaft connecting portion protruding from the shaft connecting portion forming portion of the material on which the primary drawing process is completed, and raising the protruding height of the shaft connecting portion; A tertiary drawing process of reducing the diameter of the shaft connecting portion protruding from the shaft connecting portion forming portion of the material on which the secondary drawing process is completed and flattening the upper portion of the protrusion; A fourth drawing step of reducing the diameter of the shaft connection part protruding from the shaft connection part forming part of the material on which the third drawing process is completed and raising the shaft connection part; A two-piece drawing process comprising a fifth drawing process of forming a diameter of a shaft connecting portion protruding from a shaft connecting portion forming portion of a material for which the fourth drawing process is completed to a predetermined diameter and molding a height of the shaft connecting portion to a predetermined height. Manufacturing method of dehydration tank coupler for a washing machine. The method of claim 2, wherein the primary drawing process, the diameter of the shaft connection portion on the design dimensions of 280 to 300% of the diameter, characterized in that to form a height of 55 to 60% of the height of the shaft connection portion on the design dimensions How to make a dehydration tank coupler for two-type washing machine. The method of claim 2, wherein the secondary drawing process has a diameter of 210 to 220% of the diameter of the shaft connection portion on the design dimension, characterized in that to form a height of 75 to 80% of the height of the shaft connection portion on the design dimension How to make a dehydration tank coupler for two-type washing machine. The method of claim 2, wherein the tertiary drawing process has a diameter of 140 to 150% with respect to the shaft connection diameter on the design dimension, and presses the upper portion to form a height of 70 to 75% with respect to the shaft connection height on the design dimension Method of producing a dehydration tank coupler for two-type washing machine, characterized in that. The method according to claim 2, wherein the fourth drawing process has a diameter of 120 to 130% with respect to the shaft connection diameter on the design dimension, and forms a height of 75 to 80% with respect to the height of the shaft connection portion on the design dimension. How to make a dehydration tank coupler for two-type washing machine. The dewatering tank coupler for two-screw washing machine according to claim 2, wherein the fifth drawing process forms the shaft connection portion close to the diameter and height of the shaft connection portion on the design dimension through the fourth drawing process. How to make.