KR102233044B1 - A press mold for making pulsator of washing machine and method for controlling the press mold - Google Patents

Abstract

A press mold for manufacturing a pulsator of a washing machine and a control method thereof capable of performing drawing, trimming, piercing, and flanging processes in one mold among the processes of manufacturing a blank into a pulsator are provided.
To this end, the press mold for manufacturing a pulsator of a washing machine according to the present invention includes a lower mold and an upper mold for manufacturing a blank as a pulsator between the lower mold and the lower mold by a pressing force combined with the lower mold at the upper side of the lower mold, , The lower mold comprises a lower mold holder, a lower mold disposed on the upper side of the lower mold holder and on which the blank is placed and a plurality of piercing holes are formed, and a lower mold disposed around the outer periphery of the lower mold and holding the blank placed on the lower mold A blank holder, a piercing die disposed so as to be movable vertically through a center portion of the lower die, and a piercing die interception unit that regulates vertical movement of the piercing die, wherein the upper die includes an upper die and the upper die An upper die arranged to be movable up and down at the lower side of the upper die, an upper die interception unit that regulates the vertical movement of the upper die, an upper form center punch penetrating the center of the upper die which is a part corresponding to the piercing die, and the upper die And a plurality of piercing pins coupled to a lower side of the holder and disposed outside the upper die, and a plurality of piercing pins coupled to the upper holder to penetrate the upper die and respectively corresponding to the plurality of piercing holes.

Description

Press mold for manufacturing pulsator of washing machine and its control method {A PRESS MOLD FOR MAKING PULSATOR OF WASHING MACHINE AND METHOD FOR CONTROLLING THE PRESS MOLD}

The present invention relates to a press mold for manufacturing a pulsator of a washing machine and a control method thereof.

In general, a washing machine may be divided into a drum type in which an inner tank, which is a washing tank, rotates about a horizontal direction with respect to the ground, and a top load type that rotates about a vertical direction. The drum method allows laundry to be washed in the process of rubbing or falling against the inner wall surface of the inner tub while the inner tub rotates, whereas the top rod method generates water flow while rotating the pulsator provided on the bottom surface of the inner tub. The laundry rubs or the pulsator impacts the laundry so that it is washed.

The top-load type washing machine includes an outer tub that is a storage tank, and an inner tub that is rotatably disposed within the outer tub and accommodates laundry. A pulsator is provided on the bottom surface of the inner tub to generate a rotating water flow by rotating the washing water in the inner tub while being rotated by a driving force of a motor.

The pulsator is formed in a circular shape. The pulsator is formed in a circular shape by trimming a blank (metal plate before processing) in a mold.

In addition, since the pulsator is formed with a plurality of hand holes, the washing water contained in the outer bath may enter and exit into the inner bath through the plurality of hand holes. In addition, a center hole is formed in the center portion of the pulsator to be coupled to the rotation shaft of the motor. The plurality of hand holes and the center hole are formed by pressing in a piercing mold.

In addition, the pulsator has a shape in which the center portion protrudes upward, and the convex portion and the concave portion are alternately arranged along the circumferential direction between the center portion and the outer periphery. The overall shape of the pulsator is formed by pressing in a drawing mold.

In addition, in the pulsator, the periphery of the center hole is bent downward. The downward bending around the center hole of the pulsator is formed by pressing in a flanging mold.

However, in the press mold for manufacturing a pulsator of a washing machine according to the prior art, molds for trimming, piercing, drawing, and flanging are separately provided, so that there is a problem in that a mold purchase cost is increased and a production time is increased.

The problem to be solved by the present invention is to provide a press mold for manufacturing a pulsator of a washing machine and a control method thereof that can perform drawing, trimming, piercing, and flanging processes in one mold during the process of manufacturing a blank into a pulsator. will be.

The subject of the present invention is not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the press mold for manufacturing a pulsator of a washing machine according to the present invention is to produce a blank as a pulsator between the lower mold and the lower mold by a pressing force combined with the lower mold at the upper side of the lower mold. Including an upper mold, the lower mold, a lower mold, a lower mold disposed on the upper side of the lower mold holder, the blank is placed, and a plurality of piercing holes are formed, and a lower mold disposed around the outer circumference of the lower mold and placed on the lower mold A blank holder for holding the blank, a piercing die disposed so as to be movable vertically through a center portion of the lower die, and a piercing die interception unit for controlling the vertical movement of the piercing die, and the upper die includes an upper die and , An upper die disposed to be movable up and down on the lower side of the upper holder, an upper die control unit that regulates the vertical movement of the upper die, and an upper form center punch penetrating the center of the upper die, which is a part corresponding to the piercing die. And, an upper outer punch coupled to the lower side of the upper holder and disposed outside the upper die, and a plurality of piercing pins coupled to the upper holder to penetrate the upper die and respectively corresponding to the plurality of piercing holes. Includes.

In addition, the control method of a press mold for manufacturing a pulsator for a washing machine according to the present invention includes a lower mold and an upper mold for manufacturing a blank as a pulsator between the lower mold and the lower mold by a pressing force that is combined with the lower mold at the upper side of the lower mold. Wherein the lower mold includes a lower mold, a lower mold disposed on an upper side of the lower mold holder and on which the blank is placed and a plurality of piercing holes are formed, and the blank disposed around the outer periphery of the lower mold and placed on the lower mold And a piercing die that is disposed to be movable vertically through a center portion of the lower die, and a piercing die interception unit that regulates the vertical movement of the piercing die, and the upper die includes an upper die, and the upper die, An upper die that is disposed to be movable up and down on the lower side of the upper die; an upper die interception unit that regulates the vertical movement of the upper die; and an upper form center punch penetrating the center portion of the upper die, which is a portion corresponding to the piercing die; An upper outer punch coupled to the lower side of the upper holder and disposed outside the upper die, and a plurality of piercing pins coupled to the upper holder to penetrate the upper die and respectively corresponding to the plurality of piercing holes. In the control method of a press mold for manufacturing a pulsator of a washing machine, wherein the piercing die control unit restrains the vertical movement of the piercing die, and the upper die control unit restrains the vertical movement of the upper die. , A first step of drawing the blank in a predetermined shape between the upper die and the lower die and the blank holder by moving the upper holder downward from the initial position to the first position, and the upper holder A second step of allowing the upper die control unit to vertically move the upper die after the upper die is moved upward from the first position to a second position lower than the initial position, and the upper die holder is lower than the first position. Moved down to the third position, the upper type center punch forms a center hole in the center of the blank And, after the upper-shaped outer punch trims the outer periphery of the blank, and after the upper-shaped holder is moved upward from the third position to the second position, the piercing die interception unit moves up and down the piercing die. And a fourth step of enabling the upper shape holder to move downward to a fourth position lower than the third position, so that the upper shape center punch flanges the center portion of the blank, and the plurality of piercing pins And a fifth step of forming a plurality of hand holes in the blank by being inserted into the piercing holes.

Details of other embodiments are included in the detailed description and drawings.

According to the press mold for manufacturing a pulsator of a washing machine and a control method thereof according to the present invention, drawing, trimming, piercing, and flanging processes can be performed in one mold during the process of manufacturing a blank into a pulsator.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view showing the appearance of a washing machine in which a pulsator manufactured by a press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention is installed,
Figure 2 is a side cross-sectional view of the washing machine shown in Figure 1,
Figure 3 is a view showing the pulsator shown in Figure 2,
4 is a view showing a press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention;
5 is a view showing the upper and lower positions of the upper and lower holders according to the passage of time of one cycle in the press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention;
6 is a view showing that a press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention draws a blank;
7 is a view showing a state in which a press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention completes drawing of a blank, and then the upper mold holder is moved upward and the upper mold core is moved horizontally;
8 is a view showing that the press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention pierces the center portion of the blank and trims the outer edge of the blank;
FIG. 9 is a state in which the press mold for producing pulsation of a washing machine according to an embodiment of the present invention pierces the center of the blank and trims the outer edge of the blank, and then the upper holder is moved upward and the lower core is moved in the horizontal direction. A drawing showing,
10 is a view showing that the press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention flanges the center portion of the blank and forms a plurality of hand holes in the blank;
11 is a flow chart according to a control method of a press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms. It is provided to completely inform the scope of the invention to the possessor, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

Hereinafter, a press mold for manufacturing a pulsator for a washing machine and a control method thereof according to an embodiment of the present invention will be described with reference to the drawings.

1 is a perspective view showing the appearance of a washing machine in which a pulsator manufactured by a press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention is installed, and FIG. 2 is a side cross-sectional view of the washing machine shown in FIG. 1.

1 and 2, a washing machine 100 in which a pulsator manufactured by a press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention is installed is installed. The top cover 20 disposed at the upper side, the lid assembly 30 disposed at the front of the top of the top cover 20, and the rear of the top cover 20 are disposed so that the user manipulates the washing machine 100 It includes a control panel 40 that provides an interface to be able to do so.

The cabinet 10 is formed in a square shape with an empty inside, and the top and bottom are open. The top cover 20 is coupled to the open upper end of the cabinet 10, and the square-shaped base plate 15 is coupled to the open lower end of the cabinet 10. The open lower end of the cabinet 10 is shielded by the base plate 15, and legs 17 are installed near the four corners of the base plate 15. The leg 17 prevents corrosion of the base plate 15 by separating the base plate 15 upward from the ground.

In the interior of the cabinet 10, a cylindrical outer tub 50 containing washing water and a cylindrical inner tub 60 containing laundry are installed. The outer tub 50 and the inner tub 60 have an open top. The inner tub 60 is formed to have a smaller diameter than the outer tub 50 and is rotatably disposed within the outer tub 50.

A plurality of hand holes 62 are formed on the circumferential surface of the inner tank 60. When washing water is supplied into the inner tub 60, the washing water supplied into the inner tub 60 is allowed to enter and exit through the hand 62 so that the washing water can be contained in the outer tub 50.

The outer tub 50 may be suspended through the support member 52 and disposed inside the cabinet 10. The support member 52 may have an upper end supported on an upper portion of the cabinet 10 and a lower end thereof coupled to a lower portion of the outer tub 50 to support the outer tub 50. A damper 54 is provided at the lower end of the support member 52 to buffer the shaking of the outer tub 50 due to vibration generated when the inner tub 60 rotates.

In addition, an outer shell cover 56 is disposed inside the cabinet 10. The outer tub cover 56 is provided on the outer tub 50. The outer shell cover 56 is formed in a ring shape coupled to the upper edge of the outer shell 50. The outer tank cover 56 guides the water flow that has risen through the outer tank 50 and the inner tank 60 to be poured back into the inner tank 60 by the rotational force of the inner tank 60.

In addition, a balancer 66 is disposed inside the cabinet 10. The balancer 66 is provided on the top of the inner tank 60. The balancer 66 is formed in a ring shape coupled to the upper rim of the inner tub 60 to form an inlet port for injecting laundry, which is a cloth, into the inner tub 60. In addition, the balancer 66 includes a weight having a predetermined weight therein, and thus functions to balance when the inner tank 60 is rotated.

In addition, a pulsator 65 and a motor 70 are disposed inside the cabinet 10. The pulsator 65 is provided at the bottom of the inner tub 60 to form a rotating water flow inside the inner tub 60. The motor 70 is disposed under the outer tub 50 to rotate the pulsator 65 so that the pulsator 65 can form a rotating water flow.

The motor 70 is connected to the pulsator 65 through the rotation shaft 75 to rotate the pulsator 65, and the driving force of the motor 70 is provided between the inner tank 60 and the pulsator 65. A clutch (not shown) that selectively transmits to the 60 and the pulsator 65 may be disposed. The clutch transmits the driving force of the motor 70 only to the pulsator 65 so that only the pulsator 65 is rotated, or transmits the driving force of the motor 70 to the inner tank 60 and the pulsator 65 to transmit the inner tank ( 60) and the pulsator 65 are rotated at the same time. The inner tank 60 is rotated about a vertical axis when the driving force of the motor 70 is transmitted.

In addition, a drain hose 76 and a drain control valve 77 are disposed inside the cabinet 10. The drain hose 76 is disposed at the lower end of the outer tub 50 to drain the washing water in the outer tub 50 to the outside. The drainage control valve 77 regulates the washing water flowing out through the drain hose 76.

The top cover 20 is coupled to the upper end of the cabinet 10. The top cover 20 is formed with a port outlet (not shown) that is opened and closed by the lid assembly 30. When the user lifts the lid assembly 30 and puts the fabric through the inlet port, the cloth falls and is introduced into the inner tub 60 through the inlet port formed in the balancer 66.

In addition, a detergent box 78 in which detergent is accommodated is disposed in the top cover 20 so as to be able to enter and exit, and a water supply hose (not shown) for supplying washing water to the detergent box 78 by being connected to an external water source, and a water supply hose A water supply valve 79 that regulates washing water flowing through (not shown) is disposed.

In the detergent box 78, a detergent accommodation space in which detergent is accommodated and a softener accommodation space in which a softener is accommodated are separately formed. When the water supply valve 79 is opened during the washing administration and the washing water flows into the detergent receiving space in the detergent box 78 from an external water source, the washing water flowing into the detergent receiving space is internalized together with the detergent contained in the detergent receiving space. It may fall through the opened upper side of the inner tank 60 and flow into the inner tank 60. In addition, when the water supply valve 79 is opened during the last rinsing stroke and the washing water from an external water source flows into the softener receiving space in the detergent box 78, the washing water flowing into the softener receiving space is the softener accommodated in the softener receiving space. Together with the inner tub 60, it may fall through the opened upper side of the inner tub 60 and flow into the inner tub 60.

3 is a diagram showing the pulsator shown in FIG. 2.

2 and 3, the pulsator 65 is formed in a circular shape. The pulsator 65 is formed in a circular shape by the upper-shaped outer punch 350 to be described in FIGS. 4 to 10 trimming the outer periphery of the blank 1.

In addition, since the pulsator 65 is formed with a plurality of hand holes 65a, the washing water contained in the outer tub 50 can enter and exit into the inner tub 60 through the plurality of hand holes 65a. By piercing the blank 1 by a plurality of piercing pins 360 to be described in FIGS. 4 to 10, a plurality of hand holes 65a are formed in the pulsator 65. In addition, a center hole 65d is formed in the center portion of the pulsator 65 to be coupled to the rotation shaft of the motor 70. A center hole 65d is formed in the center portion of the pulsator 65 by piercing the center portion of the blank 1 by the upper-shaped center punch 340 to be described in FIGS. 4 to 10.

In addition, the pulsator has a shape in which the center portion protrudes upward, and the convex portion 65b and the concave portion 65c are alternately arranged along the circumferential direction between the center portion and the outer edge. As the upper die 320 to be described in FIGS. 4 to 10 is merged with the lower die 220 and the blank holder 230, the lower die 220 and the blank 1 placed on the blank holder 230 are drawn and pulsed. The overall shape of the data 65 is formed.

Further, in the pulsator 65, the periphery of the center hole 65d is bent downward. As the upper-shaped center punch 340 to be described in FIGS. 4 to 10 is further moved downward after forming the center hole 65d, the pulsator 65 is bent downward around the center hole 65d.

4 is a view showing a press mold for manufacturing a pulsator for a washing machine according to an embodiment of the present invention.

Referring to FIG. 4, a lower mold 200 and an upper mold 300 disposed above the lower mold 200 are included. The upper mold 300 is moved from the upper side of the lower mold 200 to the lower mold 200 and is combined with the lower mold 200. In the press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention, the blank 1 is removed between the upper mold 300 and the lower mold 200 by a pressing force in which the upper mold 300 is fused to the lower mold 200. It is manufactured with a pulsator (65).

In particular, in the press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention, the center portion of the pulsator 65 protrudes upward, and the convex portion 65b between the center portion and the outer periphery of the pulsator 65 and A drawing process of drawing the blank 1 so that the concave portions 65c are alternately arranged along the circumferential direction, and trimming the outer periphery of the blank 1 so that the pulsator 65 has a circular shape ( A trimming step of cutting), a piercing step of forming a center hole 65d in the center portion of the pulsator 65 and forming a plurality of hand holes 65a in the pulsator 65, and the center of the pulsator 65 After the center hole 65d is formed in the part, the flanging process of bending the periphery of the center hole 65d downward can be performed in one cycle.

A detailed structure of the lower mold 200 and the upper mold 300 according to the present embodiment for performing the drawing process, the trimming process, the piercing process, and the flanging process in one cycle is as follows.

First, looking at the lower hyung (200) is as follows.

The lower mold 200 includes a lower mold holder 210, a lower mold 220, a blank holder 230, a piercing die 240, and a piercing die control unit 250.

The lower holder 210 is disposed parallel to the ground. The lower holder 210 functions as a base providing a space in which the lower die 220, the blank holder 230, the piercing die 240, and the piercing die control unit 250 can be installed on the upper side.

The lower die 220 is disposed on the upper side of the lower mold holder 210. A blank 1 is placed on the upper side of the lower die 220. The center portion of the pulsator 65 protrudes upward and the convex portion 65b and the concave portion 65c are alternately arranged along the circumferential direction between the center portion and the outer periphery of the pulsator 65, The upper side of the lower die 220 is formed in a shape corresponding to the pulsator 65.

The blank holder 230 is disposed around the outer periphery of the lower die 220. The blank holder 230 holds the blank 1 placed on the lower die 220. That is, the blank 1 is mounted on the upper side of the lower die 220 and the blank holder 230 and then fixed by the blank holder 230. The blank holder 230 may be operated by hydraulic pressure of a hydraulic cylinder to fix the blank 1.

The piercing die 240 is disposed so as to be movable vertically through the center portion of the lower die 220. The lower mold 200 further includes a lower mold elastic member 260. The piercing die 240 is supported by the lower elastic member 260 and can be moved up and down. The lower elastic member 260 is formed of a coil spring, so that the lower end is coupled to the lower holder 210 and the upper end is coupled to the lower side of the piercing die 240.

The piercing die control unit 250 regulates the vertical movement of the piercing die 240. That is, the piercing die control unit 250 selectively performs a function of allowing the piercing die 240 to move up and down, or preventing the piercing die 240 from being moved up and down.

The piercing die control unit 250 includes a lower type holder 210, a lower type core 251 disposed to be movable in a horizontal direction between the lower type die 220 and the piercing die 240, and a piercing die 240 The lower core 251 is moved to the lower side of the piercing die 240 so that the lower core 251 is not moved up and down, and the lower core 251 is removed from the lower side of the piercing die 240 so that the piercing die 240 is moved up and down. Includes a cylinder 252.

The lower air cylinder 252 may move the lower core 251 to the lower side of the piercing die 240 using air pressure, and the lower core 251 may be removed from the lower side of the piercing die 240. When the lower core 251 is moved to the lower side of the piercing die 240, the lower core 251 supports the piercing die 240, so that the piercing die 240 cannot be moved downward. In addition, when the lower core 251 comes out from the lower side of the piercing die 240, the piercing die 240 may be moved downward. Here, the lower air cylinder 252 is composed of a hydraulic cylinder that moves the lower core 251 to the lower side of the piercing die 240 using hydraulic pressure, and pulls the lower core 251 from the lower side of the piercing die 240. May be.

Next, looking at the upper mold 300 as follows.

The upper mold 300 is an upper mold holder 310, an upper die 320, an upper die control unit 330, an upper mold center punch 340, an upper mold outer punch 350, and a plurality of piercing pins 360 ).

The upper holder 310 is disposed parallel to the lower holder 210. The upper holder 310 has a space in which the upper die 320, the upper die control unit 330, the upper center punch 340, the upper outer punch 350, and a plurality of piercing pins 360 can be installed at the lower side. It performs the function of the provided base. The upper holder 310 may be moved up and down by air pressure of a main air cylinder (not shown) coupled to the upper side of the upper holder 310. Here, the main air cylinder may be configured as a hydraulic cylinder that moves the upper holder 310 up and down using hydraulic pressure.

The upper die 320 is disposed to be movable vertically under the upper mold 310. The center portion of the pulsator 65 protrudes upward and the convex portion 65b and the concave portion 65c are alternately arranged along the circumferential direction between the center portion and the outer periphery of the pulsator 65, The lower side of the upper die 320 is formed in a shape corresponding to the pulsator 65.

In order to allow the upper die 320 to be movable vertically on the lower side of the upper mold 310, the upper mold 300 preferably further includes an upper mold elastic member 370. The upper type elastic member 370 is formed of a coil spring, the upper end is coupled to the upper holder 310 and the lower end is coupled to the upper side of the upper die 320 to support the upper die 320 so as to be movable vertically.

The upper die 320 is vertically aligned with the lower die 220 and the blank holder 230.

A first protrusion 321 is formed on the upper side of the upper die 320. In this embodiment, the first protrusions 321 are formed in a plurality on the upper side of the upper die 320 by being spaced apart from each other in the horizontal direction. Accordingly, first grooves 322 are formed between the plurality of first protrusions 321, respectively.

The upper die control unit 330 regulates the vertical movement of the upper die 320. That is, the upper die control unit 330 selectively performs a function of making the upper die 320 movable up and down or preventing the upper die 320 from being moved up and down.

The upper die control unit 330 includes an upper mold core 331 disposed to be movable in a horizontal direction between the upper mold holder 310 and the upper mold 320 and the upper mold outer punch 350, and the upper mold core 331 ) And includes an upper air cylinder 332 that moves in the horizontal direction.

The upper air cylinder 332 may move the upper core 331 in the horizontal direction using air pressure. A second protrusion 333 is formed on the lower side of the upper core 331. In this embodiment, the second protrusions 333 are formed in plural on the lower side of the upper core 331 by being spaced apart from each other in the horizontal direction. Accordingly, second grooves 334 are formed between the plurality of second protrusions 333, respectively. The upper air cylinder 332 moves the upper core 331 so that the first protrusion 321 and the second protrusion 333 vertically coincide with each other so that the upper die 320 cannot be moved vertically. That is, when the first protrusion 321 and the second protrusion 333 vertically coincide with each other, since the first protrusion 321 and the second protrusion 333 abut each other, the upper die 320 is a upper holder ( 310) cannot be moved up and down by itself. In addition, the upper air cylinder 332 moves the upper core 331 so that the first protrusion 321 and the second protrusion 333 cross each other vertically so that the upper die 320 can be moved vertically. That is, when the first protrusion 321 and the second protrusion 333 cross each other vertically, the first protrusion 321 is inserted into the second groove 334, and the second protrusion 333 is a first groove ( Since it is inserted into 322, the upper die 320 can be moved up and down by itself in the upper holder 310. Here, the upper air cylinder 332 may be configured as a hydraulic cylinder that moves the upper core 331 in the horizontal direction using hydraulic pressure.

The upper-shaped center punch 340 passes through the center portion of the upper-shaped die 320 corresponding to the piercing die 240. The upper-type center punch 340 is formed vertically and the upper end is coupled to the upper-type holder 310.

The upper-shaped center punch 340 is formed of a large-diameter portion 341 and a small-diameter portion 342 protruding downward from the lower end of the large-diameter portion 341. The large-diameter portion 341 is formed to have a larger diameter than the small-diameter portion 342, and the small-diameter portion 342 is formed to have a smaller diameter than the large-diameter portion 341. The small-diameter portion 342 serves as a piercing function to form a center hole 65d in the center portion of the blank 1, and the large-diameter portion 341 bends the periphery of the center hole 65d of the blank 1 downward. It serves as a flanging function.

The piercing die 240 is formed with a small-diameter insertion hole 245 into which the small-diameter portion 342 is inserted in order to form a center hole 65d in the center portion of the blank 1.

The upper outer punch 350 is coupled to the lower side of the upper holder 310 and disposed outside the upper die 320 in the radial direction. Since the upper die 320 is vertically aligned with the lower die 220 and the blank holder 230, the upper outer punch 350 is disposed radially outward than the blank holder 230.

The plurality of piercing pins 360 are formed vertically and have an upper end coupled to the upper holder 310. The plurality of piercing pins 360 vertically penetrate the upper die 320. The upper die 320 is formed with a plurality of through-holes through which the plurality of piercing pins 360 pass vertically, respectively. The plurality of piercing pins 360 are disposed radially outward from the upper type center punch 340.

In the lower die 220, a plurality of piercing holes 225 into which a plurality of piercing pins 360 are respectively inserted are formed when a plurality of piercing pins 360 form a plurality of hand holes 65a in the blank 1. . The plurality of piercing pins 360 are disposed to correspond to the plurality of piercing holes 225, respectively.

In the press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention configured as described above, the piercing die control unit 250 is in a state in which the piercing die 240 is prevented from moving up and down, and the upper die control unit 330 ) Restrains the vertical movement of the upper die 320, when the upper holder 310 is moved downward, the upper die 320 is merged with the lower die 220 and the blank holder 230 to form a blank 1 ) Is drawn in a predetermined shape. Here, in the predetermined shape, the center portion of the blank 1 protrudes upward, and the convex portions 65b and the concave portions 65c are alternately arranged along the circumferential direction between the center portion and the outer periphery of the blank 1 Try to have a shape that can be used.

In addition, in the press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention, the piercing die control unit 250 is in a state in which the piercing die 240 is prevented from moving up and down, and the upper die control unit 330 is an upper mold. When the upper and lower holders 310 are moved downward while the die 320 is moved up and down, the upper and lower center punches 340 are merged with the piercing die 240 to form a center hole in the center of the blank 1. (65d) is formed, and the upper-shaped outer punch 350 is moved downward from the outside of the blank holder 230 to trim (cut) the outer periphery of the blank 1.

In addition, in the press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention, the piercing die control unit 250 is in a state in which the piercing die 240 is vertically moved, and the upper die control unit 330 is In a state in which the upper die 320 is moved up and down, when the upper holder 310 is moved downward, the upper form center punch 340 is merged with the piercing die 240 to flange the center portion of the blank 1 (Bending down), a plurality of piercing pins 360 form a plurality of hand holes 65a in the blank 1.

The upper holder 310 is moved downward from the initial position to the first position in order to draw the blank 1 into a predetermined shape. In addition, the upper holder 310 forms a center hole 65d in the center portion of the blank 1 and moves upward from the first position to a second position lower than the initial position in order to trim the outer periphery of the blank 1 After that, it is moved down to a third position lower than the first position. In addition, the upper holder 310 is moved upward from the third position to the second position in order to flange the center portion of the blank 1 and form a plurality of hand holes 65a in the blank 1. It is moved down to the fourth position, which is lower than the 3rd position. A detailed description of this will be described below.

5 is a view showing the upper and lower positions of the upper and lower holders according to the passage of time in one cycle in a press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention, and FIG. 6 is a pulsator of a washing machine according to an embodiment of the present invention It is a figure which shows that the manufacturing press mold draws a blank.

5 and 6, the upper holder 310 is moved downward from the initial position P0 to the first position P1 (section L1 in FIG. 5).

At the initial position (P0), the piercing die control unit 250 is in a state in which the piercing die 240 is not moved up and down, and the upper die control unit 330 prevents the upper die 320 from being moved up and down. In one state. That is, the lower core 251 is moved to the lower side of the piercing die 240 by the pneumatic pressure of the lower air cylinder 252 to support the lower side of the piercing die 240, so that the piercing die 240 can be moved downward. There is no state, and the upper core 331 is moved horizontally by the air pressure of the upper air cylinder 332 so that the first protrusion 321 and the second protrusion 333 are aligned vertically.

In this state, when the upper holder 310 is moved downward to the first position P1, the upper die 320 is merged with the lower die 220 and the blank holder 230, thereby completing the drawing process.

7 is a view showing a state in which the upper mold holder is moved upward and the upper mold core is moved horizontally after the press mold for manufacturing the pulsator of the washing machine according to the embodiment of the present invention completes drawing of the blank.

5 and 7, after the drawing process is completed, the upper holder 310 is moved upward from the first position P1 to the second position P2 lower than the initial position P0 (in FIG. 5 ). L2 section).

Thereafter, the upper die control unit 330 allows the upper die 320 to be moved up and down (section L3 in FIG. 5). That is, the upper core 331 is moved horizontally by the air pressure of the upper air cylinder 332 so that the first protrusion 321 and the second protrusion 333 are vertically staggered.

8 is a view showing that the press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention pierces the center portion of the blank and trims the outer edge of the blank.

5 and 8, after the upper die control unit 330 allows the upper die 320 to move up and down, the upper die 310 is moved from the second position P2 to the first position P1. It is moved down to the lower third position P3 (section L4 in FIG. 5). That is, when the upper holder 310 descends from the second position P2 to the first position P1, which is in the middle of moving downward from the second position P2 to the third position P3, the upper die 320 is It is merged with the blank holder 230 to fix the blank 1. Thereafter, by the force that the upper holder 310 moves downward from the first position P1 to the third position P3, the upper die 320 receives a force to be moved upward. By the way, since the first protrusion 321 and the second protrusion 333 are arranged to be alternately disposed, the first protrusion 321 is inserted into the second groove 334 and the second protrusion 333 is inserted into the first groove ( While being inserted into 322, the upper die 320 moves upward, and the upper holder 310 may move downward from the first position P1 to the third position P3.

In this way, since the upper die 320 has been moved upward, the upper center punch 340 protrudes downward from the center portion of the upper die 320, so that the small diameter portion 342 of the upper die 320 is blank. A center hole 65d is formed in the center of (1) and inserted into the small-diameter insertion hole 245 formed in the piercing die 240.

In addition, the upper-shaped outer punch 350 trims (cuts) the outer periphery of the blank 1 while crossing the outer side of the blank holder 230.

On the other hand, when the upper die 320 moves upward, the upper form elastic member 370 is pressed against the upper die 320 and is compressed to generate an elastic force that restores the upper die 320 to its original position.

FIG. 9 is a state in which the press mold for producing pulsation of a washing machine according to an embodiment of the present invention pierces the center of the blank and trims the outer edge of the blank, and then the upper holder is moved upward and the lower core is moved in the horizontal direction. It is a figure showing.

5 and 9, after the process of forming the center hole 65d in the blank 1 and the process of trimming the outside of the blank 1 are completed, the upper holder 310 is at a third position P3. Is moved up to the second position P2 (section L5 in FIG. 5).

Thereafter, the piercing die control unit 250 allows the piercing die 240 to move up and down (section L6 in FIG. 5). That is, the lower core 251 is moved horizontally by the pneumatic pressure of the lower air cylinder 252 and exits from the lower side of the piercing die 240.

10 is a view showing that the press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention flanges a center portion of a blank and forms a plurality of hand holes in the blank.

5 and 10, after the piercing die control unit 250 allows the piercing die 240 to move up and down, the upper holder 310 is positioned at a fourth position P4 lower than the third position P3. ) Is moved down (section L7 in Fig. 5).

In this way, the upper-shaped center punch 340 is further lowered compared to the process of forming the center hole 65d in the blank 1 while pushing the piercing die 240 downward. Accordingly, since the large-diameter portion 341 of the upper-shaped center punch 340 pushes the upper side around the center hole of the blank 1 downward, the periphery of the center hole of the blank 1 is bent downward and flanged.

In addition, the plurality of piercing pins 360 have a lower end protruding from the upper die 320, forming a plurality of hand holes 65a in the blank 1, and forming a plurality of piercing holes 225 formed in the lower die 220. Are inserted one by one.

Thereafter, after the drawing process, the piercing process, the trimming process, and the flanging process are completed, the upper holder 310 is moved upward from the fourth position P4 to the initial position P0 (section L8 in FIG. 5). ).

11 is a flow chart according to a control method of a press mold for manufacturing a pulsator of a washing machine according to an embodiment of the present invention. Here, a control method of a press mold for manufacturing a pulsator for a washing machine according to an embodiment of the present invention will be described in connection with the operation of a press mold for manufacturing a pulsator for a washing machine according to an embodiment of the present invention.

5, 6 and 11, in the first step (S1), the piercing die control unit 250 is in a state in which the vertical movement of the piercing die 240 is stopped, and the upper die control unit 330 is In a state where the vertical movement of the die 320 is restrained, the upper holder 310 is moved downward from the initial position P0 to the first position P1, so that the blank 1 is moved to the upper die 320 and the lower mold. It is drawn in a predetermined shape between the die 220 and the blank holder 230.

That is, in the first step (S1), the lower core 251 is advanced by the pneumatic pressure of the lower air cylinder 252 and is inserted into the lower side of the piercing die 240 to restrain the vertical movement of the piercing die 240. , In a state in which the upper core 331 is advanced by the pneumatic pressure of the upper air cylinder 332 so that the first protrusion 321 and the second protrusion 333 are aligned vertically to prevent the vertical movement of the upper die 320 , The upper holder 310 is moved downward from the initial position P0 to the first position P1, so that the blank 1 is between the upper die 320 and the lower die 220 and the blank holder 230 Is drawn in a predetermined shape.

5, 7 and 11, in the second step (S2), after the upper holder 310 is moved upward from the first position (P1) to the second position (P2) lower than the initial position (P0) , The upper die control unit 330 releases the upper and lower movement restrictions of the upper die 320 to enable the upper and lower die 320 to move up and down.

That is, in the second step (S2), after the upper holder 310 is moved upward from the first position (P1) to the second position (P2) lower than the initial position (P0), the upper type core 331 The first protrusion 321 and the second protrusion 333 are arranged vertically and staggered by the pneumatic pressure of 332, thereby allowing the upper and lower die 320 to move up and down.

5, 8 and 11, in a third step (S3), the upper holder 310 is moved downward to a third position P3 lower than the first position P1, and the upper center punch 340 ) Forms a center hole (65d) in the center portion of the blank (1), and the upper-shaped outer punch (350) trims the outer periphery of the blank (1).

That is, in the third step (S3), when the upper holder 310 is moved downward to the third position P3 lower than the first position P1, the upper die 320 is moved to the lower die 220 at the first position. After being merged to, it is moved upward by the height minus the first position P1 from the third position P3. Therefore, the upper-shaped elastic member 370 is pressed and compressed by the upper-shaped die 320, and the upper-shaped center punch 340 has a large-diameter portion 341 fused to the upper end of the piercing die 240, and the small-diameter 342 is upper-shaped. Protruding downward from the die 320 and being inserted into the small-diameter insertion hole 245 formed in the piercing die 240, a center hole 65d is formed in the center of the blank 1, and the upper outer punch 350 is While moving from the outside of the blank holder 230 to the bottom, the outside of the blank 1 is trimmed. The small-diameter portion 342 is preferably formed to protrude downward from the lower side of the large-diameter portion 341 by a height obtained by subtracting the first position P1 from the third position P3.

5, 9 and 11, in the fourth step (S4), after the upper holder 310 is moved upward from the third position (P3) to the second position (P2), the piercing die control unit 250 ) Releases the interception of the vertical movement of the piercing die 240 to enable the vertical movement of the piercing die 240.

That is, in the fourth step (S4), after the upper holder 310 is moved from the third position P3 to the second position P2, the lower core 251 is moved by the pneumatic pressure of the lower air cylinder 252. It is retracted and exits from the lower side of the piercing die 240 to allow the piercing die 240 to move up and down.

5, 10 and 11, in the fifth step (S5), the upper holder 310 is moved downward to the fourth position P4 lower than the third position P3, and the upper center punch 340 ) Flanges the center portion of the blank 1, and a plurality of piercing pins 360 form a plurality of hand holes 65a in the blank 1.

That is, in the fifth step (S5), if the upper holder 310 is moved downward to the fourth position P4 lower than the third position P3, the upper holder 310 is lower than the third position P3. When it is moved down to the 4 position (P4), the upper die 320 is merged with the lower die 220 at the first position (P1) and then the height of the fourth position (P4) minus the first position (P1). It moves upwards. Therefore, the upper-shaped elastic member 370 is pressed and compressed by the upper-shaped die 320, and the large-diameter portion 341 of the upper-shaped center punch 340 protrudes to the lower side of the upper-shaped die 320 to lower the piercing die 240. It is inserted into the inside of the lower die 220 while being pushed out to flange the center portion of the blank 1. When the piercing die 240 is pushed down by the large diameter portion 341 of the upper center punch 340, the lower elastic member 260 is compressed. In addition, the plurality of piercing pins 360 protrude downward from the upper core 331 and are inserted into the plurality of piercing holes 225 formed in the lower die 220, respectively, while a plurality of hand holes 65a are inserted into the blank 1. ) To form.

As described above, according to the press mold for manufacturing a pulsator for a washing machine and a control method thereof according to the present invention, drawing, trimming, piercing, and flanging processes are performed in the process of manufacturing the blank 1 with the pulsator 65. Can be done in the mold.

Those of ordinary skill in the art to which the present invention pertains will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. The scope of the present invention is indicated by the scope of the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. It must be interpreted.

1: blank 65: pulsator
65a: manual 65d: center hall
200: lower type 210: lower type holder
220: lower die 225: piercing hole
230: blank holder 240: piercing die
245: small-diameter insertion hole 250: piercing die interception unit
251: lower core 252: lower air cylinder
260: lower type elastic member 300: upper type
310: upper holder 320: upper die
321: first protrusion 330: upper die control unit
331: upper core 332: upper air cylinder
333: second protrusion 340: upper shape center punch
341: large-neck 342: small-neck
350: upper outer punch 360: piercing pin
370: upper type elastic member

Claims (14)

And a lower mold, and an upper mold for producing a blank with a pulsator between the lower mold and the lower mold by a pressing force combined with the lower mold from the upper side of the lower mold,
The lower mold includes a lower mold, a lower mold disposed on the upper side of the lower mold and on which the blank is placed and a plurality of piercing holes are formed, and a blank disposed around the outer circumference of the lower mold and holding the blank placed on the lower mold. A holder, a piercing die disposed so as to be movable vertically through a center portion of the lower die, and a piercing die intermittent unit for controlling vertical movement of the piercing die,
The upper mold includes an upper mold holder, an upper mold die disposed to be movable vertically under the upper mold holder, an upper mold clamping unit that regulates the vertical movement of the upper mold, and the upper mold which is a part corresponding to the piercing die. An upper-shaped center punch penetrating the center portion, an upper-shaped outer punch coupled to the lower side of the upper-shaped holder and disposed outside the upper-shaped die, and coupled to the upper-shaped holder to penetrate the upper-shaped die and correspond to the plurality of piercing holes, respectively A press mold for manufacturing a pulsator of a washing machine comprising a plurality of piercing pins that are arranged and arranged. The method according to claim 1,
In a state in which the piercing die control unit restrains the vertical movement of the piercing die, and the upper die control unit restrains the vertical movement of the upper die, when the upper die is moved downward, the upper die is moved to the lower end. It is merged with the lower die and the blank holder to draw the blank into a predetermined shape,
In a state in which the piercing die control unit restrains the vertical movement of the piercing die, and the upper die control unit enables the vertical movement of the upper die, when the upper type holder is moved downward, the upper type center punch Is merged with the piercing die to form a center hole in the center portion of the blank, and the upper-shaped outer punch is moved downward from the outside of the blank holder to trim the outer periphery of the blank,
In a state in which the piercing die control unit allows the vertical movement of the piercing die, and the upper die control unit allows the vertical movement of the upper die, when the upper type holder is moved downward, the upper type center A punch is merged with the piercing die to flange the center portion of the blank, and the plurality of piercing pins are inserted into the plurality of piercing holes to form a plurality of hand holes in the blank. The method according to claim 1,
A first protrusion is formed on the upper side of the upper die,
The upper die control unit,
An upper mold core disposed to be movable in a horizontal direction between the upper mold holder, the upper mold die and the upper mold outer punch and having a second protrusion formed at the lower side thereof,
A washing machine comprising an upper type air cylinder for moving the upper core so that the first protrusion and the second protrusion vertically coincide with each other, and moving the upper type core so that the first protrusion and the second protrusion vertically stagger each other Press mold for making pulsator of The method according to claim 1,
The piercing die enforcement unit,
A lower mold core disposed to be movable in a horizontal direction between the lower mold holder and the lower mold die and the piercing die,
Pulse of a washing machine comprising a lower air cylinder for moving the lower core to the lower side of the piercing die so that the piercing die does not move up and down, and removing the lower core from the lower side of the piercing die so that the piercing die is moved up and down. Press mold for data production. The method according to claim 1,
The above pictograph is,
It is coupled to the upper type holder, further comprising an upper type elastic member for supporting the upper type die to be movable up and down,
The lower brother,
A press mold for manufacturing a pulsator of a washing machine further comprising a lower type elastic member coupled to the lower type holder and supporting the piercing die so as to be movable up and down. The method according to claim 1,
The upper-shaped center punch includes a large-diameter portion flanging the center portion of the blank, and a small-diameter portion having a diameter smaller than that of the large-diameter portion and protruding from the lower end of the large-diameter portion and forming a center hole in the center portion of the blank ,
The piercing die is a press mold for manufacturing a pulsator for a washing machine in which a small-diameter insertion hole into which the small-diameter part is inserted to form the center hole in the center part of the blank is formed. The method according to claim 2,
In order to draw the blank into a predetermined shape, the upper holder is moved downward from an initial position to a first position. A press mold for manufacturing a pulsator for a washing machine. The method of claim 7,
In order to form the center hole in the center portion of the blank and trim the outer edge of the blank, the upper holder is moved upward from the first position to a second position lower than the initial position, and then lower than the first position. Press mold for making pulsator of washing machine that moves down to the third position. The method of claim 8,
To flange the center portion of the blank and form the plurality of hand holes in the blank, the upper holder is moved upward from the third position to the second position and then downward to a fourth position lower than the third position. Press mold for making pulsator for moving washing machine. And a lower mold, and an upper mold for producing a blank with a pulsator between the lower mold and the lower mold by a pressing force combined with the lower mold from the upper side of the lower mold,
The lower mold includes a lower mold, a lower mold disposed on the upper side of the lower mold and on which the blank is placed and a plurality of piercing holes are formed, and a blank holder disposed around the outer circumference of the lower mold and holding the blank placed on the lower mold. And, a piercing die disposed so as to be movable vertically through a center portion of the lower die, and a piercing die intermittent unit for controlling the vertical movement of the piercing die,
The upper mold includes an upper mold holder, an upper mold die disposed to be movable vertically under the upper mold holder, an upper mold clamping unit that regulates the vertical movement of the upper mold, and the upper mold which is a part corresponding to the piercing die. An upper-shaped center punch penetrating the center portion, an upper-shaped outer punch coupled to the lower side of the upper-shaped holder and disposed outside the upper-shaped die, and coupled to the upper-shaped holder to penetrate the upper-shaped die and correspond to the plurality of piercing holes, respectively In the control method of a press mold for manufacturing a pulsator of a washing machine comprising a plurality of piercing pins arranged and arranged,
In a state in which the piercing die control unit restrains the vertical movement of the piercing die, and the upper die control unit restrains the vertical movement of the upper die, the upper form holder moves downward from the initial position to the first position. A first step of drawing the blank into a predetermined shape between the upper die and the lower die and the blank holder;
A second step of allowing the upper die control unit to vertically move the upper die after the upper die is moved upward from the first position to a second position lower than the initial position;
The upper-shaped holder is moved downward to a third position lower than the first position, the upper-shaped center punch forms a center hole in the center portion of the blank, and the upper-shaped outer punch trims the outer periphery of the blank. step;
A fourth step of allowing the piercing die control unit to vertically move the piercing die after the upper holder is moved upward from the third position to the second position; And
The upper-shaped holder is moved downward to a fourth position lower than the third position, the upper-shaped center punch flanges the center portion of the blank, and the plurality of piercing pins are inserted into the plurality of piercing holes to be inserted into the blank. A method for controlling a press mold for manufacturing a pulsator of a washing machine comprising a fifth step of forming a plurality of hand holes. The method of claim 10,
A first protrusion is formed on the upper side of the upper die,
The upper die control unit,
An upper mold core disposed to be movable in a horizontal direction between the upper mold holder, the upper mold die and the upper mold outer punch and having a second protrusion formed at the lower side thereof,
A washing machine comprising an upper type air cylinder for moving the upper core so that the first protrusion and the second protrusion vertically coincide with each other, and moving the upper type core so that the first protrusion and the second protrusion vertically stagger each other Control method of press mold for making pulsator of The method of claim 10,
The piercing die enforcement unit,
A lower mold core disposed to be movable in a horizontal direction between the lower mold holder and the lower mold die and the piercing die,
Pulse of a washing machine comprising a lower air cylinder for moving the lower core to the lower side of the piercing die so that the piercing die does not move up and down, and removing the lower core from the lower side of the piercing die so that the piercing die is moved up and down. Control method of press mold for data production. The method of claim 10,
The above pictograph is,
It is coupled to the upper type holder, further comprising an upper type elastic member for supporting the upper type die to be movable up and down,
The lower brother,
A control method of a press mold for manufacturing a pulsator of a washing machine further comprising a lower elastic member coupled to the lower holder and supporting the piercing die so as to be movable up and down. The method of claim 10,
The upper-shaped center punch includes a large-diameter portion flanging the center portion of the blank, and a small-diameter portion having a diameter smaller than that of the large-diameter portion and protruding from the lower end of the large-diameter portion and forming a center hole in the center portion of the blank ,
A control method of a press mold for manufacturing a pulsator of a washing machine, wherein the piercing die has a small-diameter insertion hole into which the small-diameter part is inserted to form the center hole in the center part of the blank.

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