KR20090001156A - Lubrication device of an dieface - Google Patents

Abstract

A die face-lubricating apparatus is provided to prevent drooping or creases of the product generated due to tensile force in the forming process of a product which is formed to a deep forming depth by press forming. A die face-lubricating apparatus comprises an upper mold(20), a lower mold(10), a balance block(50), a bulged portion, and an oil supply unit(100). The balance block is installed on a top part of the lower mold. The balance block controls the holding state of the molds. The bulged portion is formed on an upper side of the lower mold. The bulged portion corresponds to the upper mold. The oil supply unit is installed in the lower mold. The oil supply unit moves forming oil to a die face(11).

Description

Die face lubrication device {Lubrication device of an dieface}

1 is a cross-sectional view of a dry forming press mold according to the prior art.

2 is a cross-sectional view of a press mold according to the present invention.

3 is a cross-sectional view showing a state in which molding oil is delivered to a die face.

4 is an enlarged view of portion A of FIGS. 2 and 3 according to the present invention;

<Explanation of symbols on main parts of the drawings>

10: lower mold 11: die face

20: upper type 30: piston

32: piston ring 35: link

40: cylinder 42: molding oil storage tank

45: check valve 50: balance block

52: spring 55: switch

60: hydraulic oversupply control unit 61: hydraulic oversupply control unit

62: spring of excessive hydraulic supply control section 63: oil control plate

70: bulge portion 80: steel sheet

100: oil supply means

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die face lubricator of a press die, and more particularly, to a lubricator for supplying molding oil to a die face by lifting and lowering of an upper die of a press die.

1 is a cross-sectional view of a dry forming press mold according to the prior art.

In general, the press die according to the prior art is composed of an upper mold (1), a lower mold (2), and a balance block (3), wherein the lower mold is provided with a bulge portion (4) for determining the flow rate of the steel sheet.

Referring to the operation of the conventional press mold apparatus configured as described above are as follows.

In a conventional press die, when a material such as steel sheet 5 is injected, the upper die 1 is lowered and the lower die 2 is raised. The upper die 1 is continuously lowered and the lower die 2 stops rising and contacts the balance block 3 to hold the steel sheet.

The lowering of the upper die 1 is stopped and the upper die 1 and the lower die 2 are held. Subsequently, the upper mold 1 and the lower mold 2 are completely matched to complete molding of the product.

However, the product of which the height of the bulge portion 4 is formed high to deepen the molding depth may cause bursting and wrinkles due to the tensile force during molding of the portion contacted with the bulge portion 4, and in the case of dry forming There is a problem in that the inflow is falling off the product.

The present invention has been made to solve the problems of the prior art,

      It is an object to prevent sagging and wrinkles caused by the tensile force during the forming process of the product formed by the press molding in a deep molding depth.

       Die face lubrication apparatus according to the present invention for realizing the above technical problem, the upper and lower die, and the balance block is installed on the upper portion of the lower mold to adjust the holding state of the mold; In the press mold apparatus formed in the upper side of the said lower mold | type, and comprised by the bulging part corresponding to an upper mold | type,

       It is characterized in that it comprises an oil supply means provided in the lower mold for moving the molding oil to the die face.

       In addition, the oil supply means is installed on the upper side of the balance block, characterized in that it comprises a switch in contact with the upper mold.

       In addition, the oil supply means is installed in the balance block, characterized in that it comprises a spring disposed opposite the switch.

       In addition, the oil supply means is characterized in that it comprises a molding oil storage tank installed on one side of the lower mold.

       In addition, the oil supply means is installed in the lower die characterized in that it comprises a cylinder which is integrally connected with the molding oil storage tank.

      In addition, the oil supply means is installed in the interior of the cylinder, characterized in that it comprises a piston for transferring the molding oil to the die face by moving up and down.

       In addition, it is characterized in that it comprises a piston ring which is installed on the piston upper side to prevent the molding oil flows down to the piston lower side.

       In addition, the oil supply means is hinged fixed to one side of the piston, it is installed on the lower side opposite to the switch, it characterized in that it comprises a link that is vertically connected while being rotatable between the piston and the switch.

       In addition, the oil supply means is installed in the plurality of cylinders, characterized in that it comprises a check valve for preventing the back flow of the molding oil.

       In addition, the oil supply means is characterized in that it comprises a hydraulic oversupply control unit is installed on the lower side of the bulge and assembled on the upper side of the lower die.

       In addition, the hydraulic oversupply control unit is installed in the hydraulic oversupply control unit body which is assembled on the blank holder, the hydraulic oversupply control unit spring installed inside the hydraulic oversupply control unit main body, and the hydraulic oversupply control unit main body. It characterized in that the oil control plate is arranged in a form facing the hydraulic and the multi-supply control unit spring.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a cross-sectional view of the press die according to the present invention, Figure 3 is a cross-sectional view showing a state in which the molding oil is delivered to the die face, Figure 4 is an enlarged view of portion A of Figure 3 according to the present invention.

Lubricating device of the die face according to the present invention, as shown in Figures 2 and 3,

An upper mold 20 for up and down movement, a lower mold 10 positioned below the upper mold 20, and a balance block 50 installed at an upper side of the lower mold to adjust a holding state with the upper mold 20; And an swelling part 70 installed above the lower mold 10 to determine the flow rate of the steel sheet when forming the steel sheet 80, and as a die face 11 of the lower mold 10 when the steel sheet 80 is formed. Oil supply means for supplying oil 100 is installed on the upper side of the balance block 50 to contact the upper mold 20, the switch 55 and the balance block 50 provided above the balance block 50, the balance block 50 And a molding oil storage tank disposed inside the spring 52 for restoring the position of the switch to face the switch 55, and penetrating through one side of the lower mold 10 to store molding oil. 42) and the die face is installed in the lower mold 10 and integrated with the molding oil storage tank 42. And a cylinder (40) connected to the cylinder, a piston (30) installed inside the cylinder (40) and moving up and down to transfer molding oil to a die face, and a molding oil installed above the piston (30). (30) It is comprised by the piston ring 32 which prevents it from flowing down.

In addition, the hinge 30 is fixed to one side of the piston 30 is installed opposite to the switch 55, and is composed of a link 35 between the piston 30 and the switch 55 is rotatable and connected vertically. .

       In addition, a plurality of check valves 45 are provided in the cylinder 40 to prevent the molding oil from flowing back.

      As shown in FIGS. 3 and 4, the hydraulic oversupply control unit 60, which is installed under the swelling unit 70 and controls the oil lifted by the piston 30, is assembled to the lower mold 10. It is installed in the main body 61 of the hydraulic oversupply control unit, the hydraulic oversupply control unit spring 62 installed in the hydraulic oversupply control unit main body 61, and the hydraulic oversupply control unit main body 61. It is composed of an oil control plate 63 disposed in a form facing the hydraulic oversupply control unit spring 62.

Looking at the operation of the present invention configured as described above are as follows.

2 and 3, when the steel sheet is placed in the press die apparatus and the upper die 20 is lowered, the balance block 50 for adjusting the holding state of the upper die 20 and the upper die 20 The switch 55 installed on the upper side of the first contact is pressed, and the lower mold 10 is held.

As the switch 55 is pressed by the upper die 20, a force is transmitted to the link 35 so that the link 35 is lowered and the piston 30 is fixed and hinged to the link 35. Rising by the link 35, the hydraulic oil 42 and the forming oil in the cylinder 40 is transferred to the die face by the rise of the piston (30).

At this time, a plurality of check valves 45 and a hydraulic oversupply control unit 60 assembled at a lower side of the bulging unit 70 and an upper side of the blank holder 10 in the cylinder 40 prevent the back flow of the molding oil. Is installed to prevent.

When the upper mold 20 is raised, the switch 55 is restored by the spring 52 and the piston 30 is lowered so that the molding oil flows into the cylinder 40 from the molding oil storage tank 42. Inflow.

      The die face lubrication apparatus according to the present invention is provided with oil supply means for applying the die-faced molding oil to the cylinder while raising the piston connected to the hinge lowered by the link installed inside the lower die by the lowering of the upper die, When product inflow is difficult due to the internal inflow is difficult to apply the molding oil to the oil supply means to reduce the coefficient of friction of the steel sheet, improve the steel sheet inflow properties can produce a good product.

Claims (11)

       Upper and lower forms; A balance block installed at an upper portion of the lower mold to adjust a holding state of the mold; In the press mold apparatus formed in the upper side of the said lower mold | type, and comprised by the bulging part corresponding to an upper mold | type, A die face lubrication apparatus comprising an oil supply means provided in the lower mold to move the molding oil to the die face. The method according to claim 1,        The oil supply means is a die-face lubrication apparatus including a switch installed on the upper side of the balance block to contact the upper mold.        The method according to claim 1,        The oil supply means is a lubrication apparatus of the die face including a spring installed in the balance block and disposed opposite the switch.        The method according to claim 1,        The oil supply means is a die face lubrication apparatus comprising a molding oil storage tank is installed on one side of the lower die.          The method according to claim 1,        The oil supply means is a die face lubrication device including a cylinder which is installed in the lower die and integrally connected to the molding oil storage tank.         The method according to claim 1,       The oil supply means is a die face lubrication device comprising a piston which is installed in the cylinder and moves up and down to transfer the molding oil to the die face.        The method according to claim 6,        A lubrication apparatus for die face having a piston ring installed above the piston to prevent the forming oil from flowing down the piston.        The method according to claim 1,        The oil supply means is hinged fixed to one side of the piston, is installed on the lower side opposite the switch, the lubrication apparatus of the die die including a link that is connected vertically rotatable between the piston and the switch.        The method according to claim 1,        The oil supply means is provided with a plurality of the inside of the cylinder, the lubrication apparatus of the die die including a check valve for preventing the flow of molding oil back. The method according to claim 1,        The oil supply means is a lubrication apparatus of the die face including a hydraulic oversupply control unit is installed on the lower side of the bulge and assembled on the upper side of the lower die. The method according to claim 10,        The hydraulic oversupply control unit is installed in the hydraulic oversupply control unit main body assembled above the blank holder, the hydraulic oversupply control unit spring installed in the hydraulic oversupply control unit main body, and is installed in the hydraulic oversupply control unit main body. Lubricating device of die face composed of oil control plate arranged to face oversupply control spring.

Images