KR100849858B1 - Apparatus for changing a die set used in forging process - Google Patents

Abstract

The present invention relates to a forging die replacement device for mechanizing and automating the operation of mounting and detaching the mold from the bolster to easily and easily perform the replacement work to block the risk of safety accidents.

To this end, the post mounting the support frame in front of the forging press; Tilting and elevating means for slidingly moving the elevating frame provided in the center of the support frame up and down by the rotation driving of the elevating lead screw, and rotating the tilting frame axially coupled to the elevating frame by the sliding; It characterized in that it comprises a replacement device mounted to the upper portion of the tilting frame to clamp the mold inside the forging press through the finger installed on the tip of the arm, the front, rear, right, left and right.

According to the above configuration, the mold provided in the forging press is clamped through the finger, and transferred through a replacement device capable of front, rear, left, right, and swing operation, so that the mold is mounted and detached from the bolster. Since the process can be mechanized and automated, there is an effect that it is easy and simple to perform mold replacement work, and there is an effect that can block the risk of safety accidents during work.

Forging, moulding, changer, clamping, arm.

Description

Apparatus for changing a die set used in forging process}

1 is a front view of a mold exchanger according to the present invention;

2 is a side view of a mold exchanger according to the present invention;

Figures 3a, 3b, 3c is a partial cross-sectional side view showing the operating state of the tilting and lifting means along the line A-A of Figure 1,

Figures 4a, 4b, 4c is a partial cutaway side cross-sectional view showing the operating state of the tilting and lifting means along the line B-B of Figure 1,

5a, 5b is a front view showing the operating state of the tilting and lifting means according to the invention,

Figure 6a, 6b is a partial cutaway front cross-sectional view showing the operating state of the lower frame and the upper frame conveying means of the replacement device according to the present invention,

Figure 7a, 7b is a partial cutaway side cross-sectional view showing the operating state of the lower frame and the upper frame conveying means of the replacement device according to the present invention,

8a, 8b is a partial cutaway side cross-sectional view showing the operating state of the arm transfer means of the replacement unit according to the present invention,

9a, 9b is a partial cutaway cross-sectional view showing the operating state of the clamping means of the arm transfer means according to the invention,

Figure 10a, 10b is a partial cutaway side cross-sectional view and planar cross-sectional view showing the configuration of the arm swing means of the replacement unit according to the present invention,

Figure 11a, 11b is a plan view showing the operating state of the arm swing means of the replacement unit according to the present invention.

* Description of Major Symbols in Drawings *

10: support frame 11: lifting rail groove

12: lifting lead screw 13: inlet hole

14: slope 20: lifting frame

21: lifting guide rail 30: tilting frame

30a: first connection frame 31: first guide rail

32: first lead nut 33: roller

40: lower frame 40a: second connection frame

41: first rail groove 42: first lead screw

43: 2nd guide rail 44: 2nd lead nut

50: upper frame 53: the second rail groove

54: second lead screw 60: swing frame

61: third lead nut 70: arm

71: third lead screw 72: long hole

73: clamping housing 74: clamping cylinder

75: clamping rod 76: supply pipe

77: finger 78: clamping rotation shaft

80: connecting housing 81: pivot

82: inner wheel gear 83: worm wheel

84: warm shaft P: post

M: Lift servo motor M1, M2, M3, M4: 1st, 2, 3, 4 servo motor

The present invention relates to a die exchange device for forging, and more particularly, forging for removing the risk of a safety accident while easily and easily performing the replacement operation by mechanizing and automating the operation of mounting and removing the mold from the bolster of the press. It relates to a mold replacement device.

In general, forging refers to a processing method of forming a uniform shape by a mechanical method of tapping or pressing a solid metal material with a hammer or the like.

In such a forging process, the metal tapping temperature is sometimes room temperature, but often needs to be heated. Forging at a temperature higher than the temperature at which recrystallization proceeds in the material is referred to as hot forging, and forging at a lower temperature is called cold forging.

In addition, in order to make the structure of the solid material uniform and to reduce the size of the crystal grains in the crystal solid, hammering operation is called annealing, and it is gradually pressurized with a tool without hammering. Making a shape of is called a press.

In particular, the press is usually installed in a certain shape of the mold (스터 型) on the lower bolster, the material is placed on the mold, and then press the material through the upper bolster, to make a product of the desired shape.

In the press working as described above, when the shape of a product to be manufactured is changed, by replacing the mold with another mold, it is possible to easily and simply produce a product having a desired shape. In this case, when the weight of the mold is light and the volume is small, the worker in the field directly adopts the mold by replacing it by hand. If the mold is heavy and the volume is large, use heavy equipment such as a forklift truck. The mold was lifted and replaced.

However, when the weight and size of the mold is a medium size that is neither large nor small, there are various problems in both a manual method and a method using heavy equipment.

That is, when the mold is replaced only by the force of a pure worker, the weight of the mold may cause a worker to suffer from musculoskeletal disorders such as a waist disc and a safety accident, and may also cause injury due to dropping of the mold during the transfer process. In addition, there is a fear that the mold may be damaged and damaged. In addition, when the mold is replaced using heavy equipment, the size of the mold is smaller than that of the heavy equipment, so that it is difficult to precisely replace the mold, and the mold and the bolster may be damaged due to excessive work by the heavy equipment during the replacement work. .

The present invention has been made to solve the conventional problems as described above, in order to replace the mold to replace the mold by replacing the mold in the bolster and mounting a different mold to the bolster mechanized and automated The present invention provides a mold replacement device for forging that can be easily and conveniently performed.

Another object of the present invention is to provide a mold replacement apparatus for forging processing that can be carried out by mechanically replacing the mold, thereby eliminating the risk of mold damage and safety accidents.

The configuration of the present invention for achieving the above object, the apparatus for replacing the mold for forging the product with another mold, comprising: a post having a support frame mounted in front of the forging press; Tilting and elevating means for slidingly moving the elevating frame provided in the center of the support frame up and down by the rotation driving of the elevating lead screw, and rotating the tilting frame axially coupled to the elevating frame by the sliding; It characterized in that it comprises a replacement device mounted to the upper portion of the tilting frame to clamp the mold inside the forging press through the finger installed on the tip of the arm, the front, rear, right, left and right.

When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention.

1 to 11b illustrate a die exchange apparatus for forging machining according to the present invention, and includes a post P, a tilting and lifting means, and a replacement device.

1 and 2, first, the post (P) is installed vertically in front of the forging press to support the bolster installed in the forging press, the support frame 10 is fixed to one surface of the post (P) Install.

The tilting and elevating means slides the elevating frame 20 provided at the center of the support frame 10 up and down by the rotation driving of the elevating lead screw 12, and moves the elevating frame 20 to the elevating frame 20 by the sliding. It serves to rotate the tilting frame 30 coupled to the axis, the support frame 10, the lifting frame 20, the lifting lead screw 12, the lifting servo motor (M), the tilting frame ( 30, the roller 33, and the insertion hole 13 are comprised.

3A through 5B, the lifting rail grooves 11 are formed on both inner surfaces of the support frame 10, and the lifting frame 20 is provided between the lifting rail grooves 11, respectively. Lifting guide rails 21 are formed on both sides of the lifting frame 20 so as to slide the frame 20 between the lifting rail grooves 11 to slide up and down. In addition, the center portion of the support frame 10 is formed in the vertical direction, and the lifting lead screw 12 is rotatably provided in the longitudinal direction in the recessed inside thereof, and the lifting frame 12 is mounted on the lifting lead screw 12 ( 20) Fit the center part.

In addition, the elevating servo motor M is connected to the lower portion of the elevating lead screw 12 by a reduction gear, and the elevating lead screw 12 is rotated forward and backward in a decelerated state. At this time, the lower end of the lifting lead screw 12 is axially coupled to the center of the bearing housing can be smoothly rotated by the bearing provided in the bearing housing.

In addition, the tilting frame 30 is axially coupled to the upper center of the lifting frame 20 so that the tilting frame 30 may be lifted together when the lifting frame 20 is lifted. This, the tilting frame 30 is formed in a 'b' shape, the lower side of the roller 33 is coupled to the roller 33 when the lifting and lowering of the tilting frame 30 in front of the support frame 10 As it is supported, it goes up and down. At this time, the rib 34 is formed between the bottom surface of the upper end of the tilting frame 30 and the roller 33 to reinforce the tilting frame 30.

In addition, since the inlet hole 13 is formed on both sides of the lower portion of the support frame 10 and the inclined surface 14 is formed on the inner surface of the inlet hole 13, the roller 33 at the bottom dead center portion of the elevating frame 20. Is smoothly drawn into and out of the inlet hole 13, and thus the tilting frame 30 can be rotated 90 degrees in the vertical or horizontal direction.

1 and 2, the replacement device clamps the mold installed in the bolster inside the forging press, through the finger 77 installed at the tip of the arm 70, so that the front, rear, left and right conveying and pivoting may be performed. It is mounted on the tilting frame 30, and further includes a lower frame transfer means, an upper frame transfer means, an arm transfer means, and an arm swing means.

First, the lower frame transfer means is a lower frame 40 provided on the upper side of the tilting frame 30 by the rotation drive of the first lead screw 42 installed between the tilting frame 30 and the lower frame 40. It serves to slide left and right, and is composed of a first connection frame 30a, a lower frame 40, a first lead screw 42, and a first servo motor M1.

6A to 7B, the first connecting frame 30a is fixedly mounted on the tilting frame 30, and the lower frame 40 can be moved left and right on the top of the first connecting frame 30a. To be installed. That is, protruding first guide rails 31 are provided on both outer surfaces of the first connection frame 30a, and both inner surfaces of the lower frame 40 are inserted into the first guide rails 31 so as to slide. The first rail groove 41 is formed in the recess.

The first lead nut 32 is fixed to the inner surface of the first connection frame 30a, and the first lead nut 32 is fixed to the first lead nut 32 so as to extend along the longitudinal direction of the lower frame 40. The first lead screw 42 is mounted. Here, one end of the first lead screw 42 is coupled to the shaft of the first servo motor M1 installed at one end of the lower frame 40 to perform forward and reverse rotation, and the other end thereof is the lower frame 40. ) Is inserted into the support member 45 installed on the other end of the inner side to rotate. At this time, the first servo motor (M1) may be provided with a reduction gear built-in to reduce the rotational speed of the first lead screw 42.

The upper frame transfer means transfers the upper frame 50 provided on one side of the upper surface of the lower frame 40 by the rotation driving of the second lead screw 54 installed between the lower frame 40 and the upper frame 50. Afterwards, it serves to slide forward, and is composed of a second connection frame 40a, an upper frame 50, a second lead screw 54 and a second servo motor M2.

In this case, the second connecting frame 40a is fixedly mounted on the upper end of the lower frame 40 in an orthogonal form, and the upper frame 50 is mounted on the upper end of the second connecting frame 40a so as to be transported before and after. . That is, protruding second guide rails 43 are provided on both outer surfaces of the second connection frame 40a, and both inner surfaces of the upper frame 50 are inserted into the second guide rails 43 so as to slide. A second rail groove 53 is formed in the recess.

In addition, the second lead nut 44 is fixed to the inner surface of the second connection frame 40a, and the second lead nut 44 is inserted into the second lead nut 44 so as to extend along the length of the upper frame 50. The second lead screw 54 is attached. Here, one end of the second lead screw 54 is coupled to the shaft of the second servo motor (M2) installed on one end of the upper frame 50, the forward and reverse rotation drive, the other end is the upper frame 50 ) Is inserted into the support member 55 installed at the other end of the inner side to rotate. At this time, the second servo motor (M2) may be provided with a reduction gear built-in to reduce the rotational speed of the second lead screw 54.

The arm transfer means installs the arm 70 through the pivot frame 60, and slides the arm 70 back and forth by rotational driving of the third lead screw 71 installed inside the arm 70. It serves to convey, and is composed of the swing frame 60, the arm 70, the third lead screw 71, the third servo motor M3, and the clamping means.

Referring to FIGS. 8A and 8B, a revolving frame 60 having a penetrating interior is installed on an upper end of the connecting housing 80 installed on the upper surface of the upper frame 50, and a third lead nut is disposed on the inner surface of the revolving frame 60. Fit 61. The arm 70 may be installed to slide forward and backward through the inside of the pivot frame 60, and the arm 70 may be moved back and forth without interfering with the third lead nut 61. Long holes 72 are formed in the longitudinal direction on the bottom surface thereof.

In addition, a third lead screw 71 is provided inside the arm 70 so as to be inserted into the third lead nut 61 and rotate, and an end of the third lead screw 71 is installed at one end of the arm 70. The third servo motor (M3) is coupled to the axis of the forward and reverse rotation drive, the other end of the arm 70 is provided with a clamping means for clamping or releasing the mold by the finger 77.

9A and 9B, the clamping housing 73 is installed in front of the arm 70, and the clamping cylinder 74 is disposed at the center of the rear side of the clamping housing 73. To install, but the clamping cylinder (74) is built in the arm 70 in front of the installation.

Then, one end of the supply pipe 76 is connected to the outside of the clamping cylinder 74, the other end of the supply pipe 76 is connected to the nipple (76a) installed in the rear through the arm 70, the nipple ( By supplying the working fluid to 76a), the working fluid is introduced into the clamping cylinder 74. Here, although the hydraulic pressure is appropriate as the working fluid, pneumatic pressure may be used in some cases.

In addition, the clamping cylinder 74 is coupled to the center of the clamping rod 75, which is transferred to the front and rear by the working fluid, the front of the clamping rod 75 is provided with fingers 77. Here, the finger 77 is rotated around the clamping rotation shaft 78 installed on both ends of the clamping housing 73 as the clamping rod 75 is transferred to clamp or release the clamping.

Arm swing means is installed between the upper frame 50 and the swing frame 60 to drive the swing frame 60, the connecting housing 80, the pivot shaft 81, the inner ring The gear 82, the 4th servo motor M4, and a power transmission means are comprised.

10A to 11B, the connecting housing 80 is installed between the upper frame 50 and the swinging frame 60, and a lower portion of the pivoting frame 60 is formed around the center of the connecting housing 80. The pivot shaft 81 is fixed to be rotatable, and an inner ring gear 82 is mounted around the bottom of the pivot shaft 81 so as to rotate together with the pivot shaft 81.

In addition, a fourth servo motor M4 is installed at one side of the housing 80 so as to drive the inner wheel gear 82 forward and reverse rotation, and the driving force of the fourth servo motor M4 is applied to the inner wheel gear 82. Power transmission means is provided between the fourth servo motor (M4) and the inner ring gear (82) so that it can be transmitted to.

Here, the configuration of the power transmission means, the worm wheel 83 is attached to the end of the fourth servo motor (M4), and both ends of the worm wheel 83 and the inner ring gear 82 to be engaged with each other. A worm shaft 84 formed with each of the worms is provided to transmit the driving force of the fourth servo motor M4 to the inner ring gear 82. At this time, the worm shaft 84 is constrained in the worm shaft housing (84a) having a bearing therein to enable rotation.

Meanwhile, the lifting servo motor M and the first, second, third and fourth servo motors M1, M2, M3, M4 and the clamping cylinder 74 are not shown in the drawings, but are provided in the controller. On / off control is possible through the power switch, and feed control is possible through each operation switch.

Referring to the operation and effect of the present invention configured as described in detail as follows.

In order to replace the mold installed in the bolster in the forging press by using the forging die replacement apparatus of the present invention, first, by elevating and lifting the servo motor (M), the lifting lead screw (12) connected to the lifting servo motor (M) Rotate). As such, when the lifting lead screw 12 is rotated, the lifting frame 20 fitted to the lifting lead screw 12 and the tilting frame 30 coupled with the lifting frame 20 are supported as shown in FIG. 5B. Guided to the elevating rail groove 11 formed in the) is to slide upward.

At this time, at the bottom dead center position before the tilting frame 30 ascends, as shown in FIG. 4A, the roller 33 of the tilting frame 30 is inserted into the inlet hole 13. As the lifting frame 20 ascends, the roller 33 comes up on the inclined surface 14 of the upper end of the inlet hole 13, and thus the tilting frame 30 is centered on the axis of the lifting frame 20. The tilting rotation is about 90 ˚ so that the upper end of the tilting frame 30 is horizontal.

After such a tilting action, the elevating lead screw 12 is continuously rotated to raise the elevating frame 20 until the height of the finger 77 in front of the replacement unit coincides with the height of the mold.

After the synergy, the first servo motor M1 mounted on one end of the lower frame 40 is rotated forward to rotate the first lead screw 42 connected to the first servo motor M1. Let's do it. As such, when the first lead screw 42 is rotated, the first lead screw 42 is fitted to the first lead nut 32, and the first lead nut 32 is mounted on the tilting frame 30. Since it is fixed to the first connection frame 30a, as shown in FIG. 6b, the first lead screw 42 is guided to the first lead nut 32 to transfer the lower frame 40 to one side.

In this case, as illustrated in FIG. 7B, first guide rails 31 may be formed on both outer sides of the first connection frame 30a, and first rail grooves 41 may be formed on both inner sides of the lower frame 40. It is possible to naturally slide the 40 to the desired position.

After the transfer operation of the lower frame 40 as described above, the second servo motor M2 mounted on one end of the upper frame 50 is rotated forward to connect the second lead connected to the second servo motor M2. Rotate the screw 54.

As such, when the second lead screw 54 is rotated, the second lead screw 54 is fitted to the second lead nut 44, and the second lead nut 44 is mounted on the lower frame 40. It is fixed to the second connecting frame 40a, the second lead screw 54 is guided to the second lead nut 44 as shown in Figure 7b to transfer the upper frame 50 to the front. In this case, as shown in FIG. 6B, second guide rails 43 are formed on both outer sides of the second connection frame 40a, and second rail grooves 53 are formed on both inner sides of the upper frame 50, thereby forming an upper frame ( It is possible to naturally slide 50) to the desired position.

After the transfer operation of the upper frame 50, the third lead screw connected to the third servo motor M3 is rotated forward by rotating the third servo motor M3 mounted at the end of the arm 70. Rotate 71.

As such, when the third lead screw 71 is rotated, the third lead screw 71 is fitted to the third lead nut 61, and the third lead nut 61 is fixed inside the swing frame 60. As shown in FIG. 8B, the third lead screw 71 is guided to the third lead nut 61 to transfer the arm 70 forward. In this case, since the long hole 72 is formed on the bottom of the arm 70, the arm 70 may slide and move through the turning frame 60 without being interfered with the third lead nut 61. .

As such, when the arm 70 is transferred, the finger 77 mounted at the tip of the arm 70 is inserted into the clamping hole formed at both sides of the mold, and then the clamping cylinder is formed through the working fluid as shown in FIG. By driving 74 to reverse the clamping rod 75, the finger 77 clamps the mold.

After clamping the mold, the third servo motor M3 is rotated in reverse to slide the arm 70 backward. Accordingly, the mold is conveyed to the rear together with the arm 70 in a state of being clamped to the finger 77 to be separated out of the forging press.

Thereafter, as shown in FIGS. 10B and 11B, the fourth servomotor M4 is rotated forward to rotate the worm shaft 84, and the inner ring gear 82 is rotated through the rotation of the worm shaft 84. At this time, the inner ring gear 82 is coupled to the pivot shaft 81, the pivot shaft 81 is coupled to the pivot frame 60, the arm 70 is provided through the inside of the pivot frame 60 It is possible to rotate the mold together with.

As such, the arm 70 is rotated to stop and rest at the position where the mold is to be seated, and the clamping cylinder 74 is driven to release the clamping action of the finger 77. Then, the mold to be replaced is clamped and transported through the driving of the clamping cylinder 74 as described above, and before, after, left, right, and swiveling of the replacement device to be seated on the bolster provided in the forging press. Accordingly, the replacement work of the mold is completed.

On the other hand, when the replacement device unit is no longer used after the replacement of the mold as described above, the above-mentioned lifting servo motor (M) and the first, second, third, fourth servo motor (M1) (M2) It is possible to return (M3) and (M4) by rotating the replacement unit to the position before the drive.

Although the present invention has been described in detail only with respect to the specific examples described above, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims.

As described above, the present invention transfers the mold provided in the forging press through a replacement device capable of front, rear, left, right and swing operations, and clamps and transfers the mold through a finger, thereby transferring the mold from the bolster. As a result, a series of detachable processes can be mechanized and automated. Therefore, not only can the mold replacement work be performed more easily and simply, but there is an effect that can block the risk of injury of the operator, which occurred in the conventional mold replacement work.

In addition, the present invention is capable of mechanizing and automating the mold length and detachment work as described above, there is an excellent effect that can fundamentally block the risk of mold damage or safety accidents caused by the falling mold.

Claims (9)

delete Sliding transfer up and down the post with the supporting frame in front of the forging press and the lifting frame provided in the center of the supporting frame so as to replace the mold for forging processing of the product with another mold by the rotation driving of the lifting lead screw. And tilting and elevating means for rotating the tilting frame axially coupled to the upper surface of the elevating frame by the sliding, and clamping the mold inside the forging press through a finger installed at the tip of the arm. In the mold exchange device for forging processing comprising a replacement device portion mounted to the upper portion of the tilting frame to be pivotal transfer, The tilting and lifting means, A support frame 10 having lifting rail grooves 11 formed on both inner surfaces thereof; An elevating frame (20) formed between the elevating rail grooves (11) to form elevating guide rails (21) on both sides to slide upward and downward; A lifting lead screw 12 which is rotatably provided in the center of the support frame 10 and into which the lifting frame 20 is fitted; A lift servo motor (M) connected to a lower end of the lift lead screw 12 to drive the lift lead screw 12 forward and reverse rotation; A tilting frame 30 which is axially coupled to the upper and lowering frames 20 so as to be rotated 90 degrees vertically or horizontally at a bottom dead center portion according to the lifting and lowering of the lifting frames 20; Rollers 33 provided on both sides of the lower side of the tilting frame 30 and supported on the front of the support frame 10 when the lifting frame 20 is lowered; It characterized in that it comprises an inlet hole 13 formed in the inclined surface 14 on both inner upper surfaces of the lower end of the support frame 10 so that the roller 33 can be pulled in or out when lifting the lifting frame 20 Mold changer for forging. The method of claim 2, wherein the replacement device unit, Lower frame for slidingly moving the lower frame 40 provided on the upper side of the tilting frame 30 to the left and right by rotational driving of the first lead screw 42 installed between the tilting frame 30 and the lower frame 40. Transfer means; By sliding the second lead screw 54 installed between the lower frame 40 and the upper frame 50, the upper frame 50 provided on one side of the upper surface of the lower frame 40 is moved forward and backward. Upper frame conveying means; An arm 70 is installed to penetrate the revolving frame 60, and the arm 70 slides the arm 70 forward and backward by rotational driving of the third lead screw 71 installed inside the arm 70. Means; It is installed between the upper frame 50 and the revolving frame 60, the mold exchange device for forging, characterized in that it comprises an arm swing means for driving the revolving frame (60). The method of claim 3, wherein the lower frame transfer means, A first connection frame 30a installed at an upper end of the tilting frame 30, having first guide rails 31 protruding from both outer surfaces, and a first lead nut 32 mounted on an upper surface thereof; A lower frame 40 provided on an upper end of the first connection frame 30a and having first rail grooves 41 formed on both inner surfaces thereof so as to slide in the first guide rail 31; A first lead screw (42) rotatably mounted in the longitudinal direction of the lower frame (40) and fitted to the first lead nut (32); And a first servo motor (M1) connected to an end of the first lead screw (42) to drive the first lead screw (42) forward and reverse rotation. According to claim 3, wherein the upper frame transfer means, A second connection frame 40a installed at an upper end of the lower frame 40, having second guide rails 43 protruding from both outer surfaces thereof, and a second lead nut 44 mounted on an upper surface thereof; An upper frame 50 provided at an upper end of the second connection frame 40a and having second rail grooves 53 formed on both inner surfaces thereof so as to slide in the second guide rail 43; A second lead screw (54) rotatably mounted along the longitudinal direction of the upper frame (50) and fitted to the second lead nut (44); And a second servo motor (M2) connected to and mounted to an end of the second lead screw (54) to drive the second lead screw (54) forward and reverse rotation. The method of claim 3, wherein the arm transfer means, A pivot frame 60 installed on an upper end of the connecting housing 80 installed on the upper surface of the upper frame 50 and having a third lead nut 61 mounted on an inner upper surface thereof; An arm having a long hole 72 formed in a longitudinal direction on the bottom thereof so as to be slidably moved forward and backward through the inside of the pivot frame 60 so as to be transported without interfering with the third lead nut 61. 70); A third lead screw (71) rotatably installed in the arm (70) and fitted to the third lead nut (61); A third servo motor (M3) connected to an end of the third lead screw (71) to drive the third lead screw (71) forward and reverse rotation; And a clamping means for clamping or unclamping a mold by using a finger (77) installed in front of the arm (70). The method of claim 6, wherein the clamping means, A clamping housing 73 installed in front of the arm 70; A clamping cylinder (74) mounted to the rear of the clamping housing (73) to be embedded in the arm (70); A supply pipe 76 connected to an outside of the clamping cylinder 74 to supply a working fluid therein; A clamping rod 75 provided at a center of the clamping cylinder 74 and transferred back and forth by a working fluid; Forgings characterized in that it comprises a finger 77 for clamping or releasing the mold by rotating around the clamping rotary shaft 78 installed on both ends of the clamping housing 73 in accordance with the transfer of the clamping rod (75) Mold changer for processing. The arm swing means of claim 3, A connection housing 80 installed between the upper frame 50 and the swing frame 60; A pivot shaft 81 mounted at a lower end of the pivot frame 60 to rotate about a center of the connection housing 80; An inner ring gear 82 fixed around a lower end of the pivot shaft 81 and rotating together with the pivot shaft 81; A fourth servo motor (M4) installed at one side of the housing (80) so as to drive the inner ring gear (82) forward and reverse rotation; And a power transmission means for transmitting the driving force of the fourth servo motor (M4) to the inner ring gear (82). The power transmission means of claim 8, further comprising: a worm wheel (83) mounted at the end of the fourth servo motor (M4); Forging processing, characterized in that it comprises a worm shaft (84) formed at each end of the worm wheel (83) and the inner ring gear (82) respectively engaged with each other so as to transfer the driving force of the fourth servo motor (M4). Mold changer.

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