KR101774864B1 - Press for making towing hook - Google Patents

Abstract

The present invention relates to a local heating press facility to manufacture a pull ring for a vehicle in which a head portion of a rod having a head is locally heated and plastic-worked. The press facility, which is to process a workpiece including a spherical head and a bar-shaped shank connected to the head, comprises: a heating device to heat the head of the workpiece; a mold supporting portion including a lower portion frame and an upper portion frame moving up and down on an upper portion of the lower portion frame; a plating forming portion to plate the head of the workpiece; a piercing forming portion to pierce the head of the workpiece; a trimming forming portion to trim the head of the workpiece; and a balancing forming portion to process the head of the workpiece.

Description

{Press for making towing hook}

The present invention relates to a local heating press installation for manufacturing a traction ring for a vehicle in which a head portion of a bar having a head is locally heated and plastic-worked.

Forging is a method of making a solid shape by mechanical method of knocking or pressing a solid metal material, and it is classified into hot forging, hot forging and cold forging according to the temperature at which processing is performed.

Since hot forging is performed at a high temperature, it is easy to perform plastic working even with a small force, but it requires a large number of inputting personnel, and there is a problem of decarburization, precision deterioration, deformation and scrap generation. In cold forging, the precision of the process is high, but productivity is reduced due to excessive molding load, manufacturing cost is high, and the number of processes for removing stress and scaling is increased.

On the other hand, since the conventional traction ring for a vehicle is manufactured by hot forging or cold forging, the same problem as described above occurs during manufacture.

For this reason, in the prior art of Registration No. 10-1214801, a method of forming a rough shape of a work piece by cold forging and then heating a part of the work piece to form a part having a complicated shape by hot forging.

However, since the hot forging process of the prior art is performed by a press machine, there is a possibility that the precision of the product may deteriorate due to a large load of the press machine during processing.

KR 10-1214801 B1

SUMMARY OF THE INVENTION It is an object of the present invention to provide a local heating press facility for manufacturing a pull ring for a vehicle which can improve the precision of a product.

In addition to this, it is intended to provide a local heating press facility for manufacturing a pull ring for a vehicle which can improve the safety and easiness of work.

According to the present invention for solving the above problems, there is provided an apparatus for processing a workpiece comprising a head and a shank connected to the head, the apparatus comprising: a heating device for heating a head of the workpiece; A mold supporting portion comprising a lower frame and an upper frame moving up and down at an upper portion of the lower frame; A lower plating metal supported on the lower frame and having a heated workpiece placed thereon, an upper plating metal supported on the upper frame and flattening the head of the workpiece placed on the upper plating metal mold, A plating forming part protruding from the upper surface of the lower plating metal mold and configured to support the shank of the workpiece and to be elastically movable up and down; A lower piercing mold supported on the lower frame and having a workpiece routed through the plating forming part, and an upper piercing die supported on the upper frame and piercing the center of the head of the workpiece placed on the upper piercing die A piercing forming unit configured to form a piercing hole; A lower trimming mold supported on the lower frame and having a workpiece routed through the plating forming section, and an upper trimming mold supported on the upper frame and trimming the head of the workpiece placed on the lower trimming mold A trimming molding part; A lower balancing die supported on the lower frame and having a workpiece routed through the piercing and trimming molding portions, and a lower balancing die supported on the upper frame and adapted to process a head of the workpiece placed on the upper balancing die, A local heating press facility for manufacturing a pull ring for a vehicle characterized by comprising a balancing forming part composed of a mold.

Wherein the upper piercing die includes an elastic part having a fixing part fixed to the upper frame and a punch through hole coupled to a lower surface of the fixing part through a spring and formed up and down, And a punch penetrating the punch through hole.

The lower trimming mold may include a fixing part fixed to the lower frame, and an elastic part coupled to an upper surface of the fixing part through a spring and having a trimming knife on an upper surface thereof.

The press facility may further include a workpiece transfer device for moving the workpiece between the plating forming section, the piercing forming section, the trimming forming section, and the balancing forming section.

The workpiece conveying apparatus includes a main rail having a circulation type, a plating forming portion, a piercing forming portion, a trimming forming portion, and a sub rail having an upper end connected to the main rail at a position of the balancing forming portion, And a spring inserted into the sub rail. A plurality of workpiece support members fitted to the guide rails and receiving a shank end of the workpiece; And a driving member for circulating the workpiece support member along the guide rails.

The local heating press facility for manufacturing a traction ring for a vehicle according to the present invention can precisely process a workpiece in a planned shape through a plurality of pressing processes.

The press facility is not easily broken during the process and also prevents breakage of the workpiece.

It also ensures the safety of workers, increases productivity and reduces manufacturing costs.

In addition, there is little occurrence of scrap during the process, and it is possible to reduce the cost and effort required for processing the scrap.

1 is a perspective view of a local heating press facility for manufacturing a pull ring for a vehicle according to the present invention.
2 (a-1), (a-2) and (b) are explanatory views of a plating forming section constituting the press facility.
3 (a) and 3 (b) are explanatory diagrams of a piercing forming unit constituting the press facility.
4 is an explanatory view of a lower trimming mold constituting the press facility.
5 is a perspective view of a press installation including a workpiece transfer device.
6 to 8 are explanatory diagrams of the above-mentioned workpiece-conveying device.

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

The present invention relates to a local heating press facility for manufacturing a traction ring for a vehicle which processes a workpiece (2) comprising a head (2a) and a shank (2b) connected to the head (2a).

The workpiece 2 serves to heat only a part of the head 2a of the workpiece 2 cut to a predetermined length to precisely process a desired shape.

The head 2a of the workpiece 2 may be formed in a spherical shape so that the cross-sectional area of only the head 2a may be larger than other portions of the workpiece, ≪ / RTI >

Fig. 1 shows a whole perspective view of a local heating press installation 1 for manufacturing a pull ring for a vehicle according to the present invention.

A local heating press facility 1 for manufacturing a pull ring for a vehicle according to the present invention comprises a heating device 10, a mold support part 20, a plating molding part 30, a piercing molding part 40, 50 and a balancing forming portion 60. [

The heating device 10 heats only the head 2a of the workpiece 2 to make the head part easier to process. A method of generating heat through the high-frequency current may be applied to the heating apparatus 10, but other methods may be applied as long as the head of the workpiece 2 can be heated to a predetermined temperature.

The mold supporting portion 20 is composed of a lower frame 21 and an upper frame 22 which moves up and down at the upper portion of the lower frame 21. Each of the lower molds 31, 41, 51, 61 of the plating forming portion 30, the piercing forming portion 40, the trimming forming portion 50 and the balancing forming portion 60 is supported by the lower frame 21 And the upper frame 22 is supported on the upper frame 22 so that the upper frame 22 is moved up and down so that the upper mold is pressed against the lower mold, .

More specifically, the plating forming part 30 comprises a lower plating mold 31, an upper plating mold 32 and a shank land 33. 2 (a-1), (a-2) and (b) are explanatory diagrams of the plating forming section 30. FIG. 2 (a-1) shows a case in which the head 2a of the workpiece 2 is spherical. Fig. 2 (a-2) .

The lower plating metal mold 31 is supported on a lower frame 21 and a workpiece 2 heated by a heating device 10 is placed thereon. The upper plating metal mold 32 is supported by the upper frame 22 and presses the workpiece 2 placed on the lower plating metal mold 31 as the upper frame 22 moves upward and downward, The head 2a is flattened. The upper surface of the lower plating metal mold 31 and the upper surface of the upper plating metal mold 32 are respectively formed with half grooves hg having a shape to engage with the shape of the workpiece 2 to be machined.

The shank land 33 protrudes from the upper surface of the lower plating metal 31 to support the shank 2b of the workpiece 2 and is elastically movable up and down. Thus, as shown in (a-1) of FIG. 2, before the head 2a of the workpiece 2 is flattened, the workpiece 2 placed on the lower plating metal mold 31 is shank 2 (b), it is possible to prevent the workpiece 2 from being tilted or rolled by the head 2a having a cross section larger than that of the workpiece 2b, and when the workpiece 2 is pressed by the upper platen mold 32, It is possible to prevent the shank 2b of the workpiece 2 from being deformed by moving down with the workpiece 2 as shown in Fig.

The piercing forming unit 40 includes a lower piercing mold 41 supported on the lower frame 21 and having a workpiece 2 placed thereon through the plating forming unit 30, And an upper piercing mold 42 which is supported on the upper piercing mold 22 and pierces the center of the head 2a of the workpiece 2 placed on the upper piercing mold 41. 3 (a) and 3 (b) are explanatory diagrams of the pierced forming section 40.

The upper surface of the lower piercing die 41 and the lower piercing die 42 are formed with half grooves hg which are engaged with the shape of the workpiece 2 through the plating forming portion 30, A punch 42c is provided at a center position of the workpiece head 2a of the piercing mold 42 and a hole H is provided at a center position of the workpiece head 2a of the lower piercing metal 41, Through the hole H to the bottom of the upper surface of the lower piercing die 41 and pierce the central portion of the workpiece head 2a. The scrap generated by piercing the central portion of the workpiece head 2a can be discharged to the outside through the hole H.

The upper piercing mold 42 includes a fixing portion 42a fixed to the upper frame 22 and a punch through hole PH (not shown) coupled to a lower surface of the fixing portion 42a via a spring S And a punch 42c coupled to a lower surface of the fixing portion 42a and penetrating the punch through hole PH of the elastic portion 42b.

3 (a), when the upper frame 22 is moved downward, the lower portion of the elastic portion 42b contacts the upper surface of the lower piercing die 41, When the upper frame 22 is further moved downward, the workpiece 2 is held in contact with the spring body 2 and the spring S is retracted in the state in which the elastic portion 42b is fixed as shown in FIG. 3 (b) And the punch 42c moves downward along the fixing portion 42a to pierce the central portion of the workpiece head 2a. Since the workpiece 2 is completely fixed by the elastic portion 42b and then pressed by the punch 42c, the workpiece 2 can be pierced with respect to the precise position of the workpiece head 2a.

The punch 42c is also coupled to the lower surface of the fixing portion 42a through the spring S2 so that the punch 42c can be prevented from being easily damaged by buffering during the piercing operation. In this case, the spring S2 between the punch 42c and the fixing portion 42a should be formed shorter than the spring S between the elastic portion 42b and the fixing portion 42a.

The trimming molding unit 50 includes a lower trimming mold 51 supported on the lower frame 21 and having a workpiece 2 placed thereon through the plating molding unit 30, 22 and an upper trimming mold 52 for trimming the head 2a of the workpiece 2 placed on the lower trimming mold 51. [

The lower surface of the lower trimming mold 51 and the upper trimming mold 52 are formed with half grooves hg which are engaged with the shape of the workpiece 2 through the plating forming portion 30, The upper trimming mold 51 can be firmly fixed between the lower trimming mold 51 and the upper trimming mold 52 and can be fixed around the head 2a portion of the workpiece 2 in the half groove hg of the lower trimming mold 51. [ A trimming knife N is provided to remove an unnecessary portion from the peripheral portion of the workpiece head 2a. A hole (H) is formed around the trimming knife (N), and the scrap generated by the trimming operation is discharged to the outside.

4, the lower trimming mold 51 is coupled to the upper surface of the fixing portion 51a through a fixing portion 51a fixed to the lower frame 21 and a spring S, And an elastic portion 51b provided with a trimming knife N.

The elastic portion 51b is elastically moved by the pressure of the upper trimming mold 52 to relieve the impact so that the trimming knife N is not easily damaged.

The order of the piercing forming part 40 and the trimming forming part 50 may be reversed.

The balancing forming part 60 includes a lower balancing mold 61 supported on the lower frame 21 and having a work piece 2 passed through the piercing forming part 40 and the trimming forming part 50, And an upper balancing mold 62 supported by the upper frame 22. [

A bottom surface of the lower balancing metal mold 61 and a bottom surface of the upper balancing metal mold 62 are respectively formed with half grooves hg in a shape engaging with the shape of the planned workpiece 2, And corrects the imbalance that may be caused by the pressing force applied to the workpiece 2 while passing through the plating forming portion 30, the piercing forming portion 40, and the trimming forming portion 50.

The upper balancing metal mold 62 also includes a fixing portion 62a fixed to the upper frame 22 and an elastic portion 62b connected to a lower surface of the fixing portion through a spring S to buffer the load during the balancing operation So that the workpiece 2 is not damaged.

The pressing apparatus 1 according to the present invention is a press apparatus 1 for moving the workpiece 2 between a plating forming section 30, a piercing forming section 40, a trimming forming section 50 and a balancing forming section 60 Piece conveying device 70 as shown in FIG.

The workpiece transferring device 70 can automatically move the workpiece 2 to each of the forming portions 30, 40, 50 and 60 according to the forging process, thereby improving the safety of the worker and saving manpower .

The workpiece transfer device 70 includes a guide rail 71, a plurality of workpiece support members 72, and a drive member 73. Fig. 5 shows a press installation 1 including such a workpiece conveying device 70. Fig.

The guide rail 71 is formed in a circular shape and the workpiece support member 72 can be moved along the guide rail 71 by inserting the guide rail 71. The end of the shank 2b of the workpiece 2 is received in the workpiece support member 72 so that the workpiece support member 72 moves along the guide rail 71, . And the driving member 73 provides power to allow the workpiece support member 72 to move along the guide rail 71.

The guide rail 71 includes a circulating main rail 71a, a plating forming portion 30 of the main rail 71a, a piercing forming portion 40, a trimming forming portion 50, and a balancing forming portion A sub rail 71b having an upper end connected to the main rail 71a at a position of the sub rail 71 and a spring 71c inserted into the sub rail 71b.

6, the workpiece 2 is moved not only linearly along the molding portions 30, 40, 50 and 60 but linearly along the half-grooves hg formed in the respective molding portions, And also moves upward and downward by the pressing process. The sub rail 71b serves as a path for moving the workpiece 2 in the vertical direction and the spring 71c presses the workpiece support member 72 upwardly to press the workpiece 2 When the workpiece support member 72 does not receive the pressing force of the upper frame 22, it is positioned on the main rail 71a so as to be circulated along the main rail 71a.

As shown in Fig. 7, the driving member 73 includes a circulating chain 73a spaced apart from the main rail 71a, a sprocket (not shown) engaged with the chain, And a motor (not shown) for rotating the sprocket. The workpiece support member 72 includes a gear tooth 72a so that the gear teeth of the workpiece support member 72 are engaged with the drive member 73, Thereby causing the chain to circulate together as it circulates.

The workpiece support member 72 has a mounting groove 72b shaped to engage with the end surface of the shank 2b and the mounting groove has a cap member 72c hinged to the body of the workpiece support member 72, Lt; / RTI >

The cap member 72c is kept in the open state before the workpiece 2 heated by the head 2a is placed in the mounting groove 72b of the workpiece support member 72 as shown in Fig. And after the workpiece 2 is mounted in the mounting groove 72b, the workpiece support member 72 is moved by collision with the closure C formed at a distance from the guide rail 71 as the workpiece support member 72 moves. After passing through each of the forming portions 30, 40, 50 and 60, the workpiece 2 is separated from the guide rail 71 and is opened by an opener O moving up and down. Will be exported. The opener O is fixed to the upper frame 22 and can move up and down.

The workpiece after passing through the press facility according to the present invention is completed with a pulling ring for a vehicle through a heat treatment step, a rolling step and the like.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. And thus fall within the scope of the present invention.

1: Local heating press facility for manufacturing traction rings for vehicles
2: Workpiece
2a: head 2b: shank
10: Heating device 20: Mold support
21: lower frame 22: upper frame
30: plating forming part 31: lower plating metal mold
32: upper plating mold 33: shank zone
40: Piercing forming part 41: Lower piercing mold
42: upper piercing mold 42a:
42b: elastic portion 42c: punch
50: trimming molding section 51: lower trimming mold
51a: Fixing portion 51b: Elastic portion
52: upper trimming mold 60: balancing forming part
61: lower balancing mold 62: upper balancing mold
70: Workpiece transfer device 71: Guide rail
71a: main rail 71b: sub rail
71c: spring 72: workpiece supporting member
73: driving member
PH: Punch through hole N: Trimming knife
S: Spring

Claims (5)

A machine for processing a workpiece comprising a head and a shank connected to the head,
A heating device for heating the head of the workpiece;
A mold supporting portion comprising a lower frame and an upper frame moving up and down at an upper portion of the lower frame;
A lower plating metal supported on the lower frame and having a heated workpiece placed thereon, an upper plating metal supported on the upper frame and flattening the head of the workpiece placed on the upper plating metal mold, A plating forming part protruding from the upper surface of the lower plating metal mold and configured to support the shank of the workpiece and to be elastically movable up and down;
A lower piercing mold supported on the lower frame and having a workpiece routed through the plating forming part, and an upper piercing die supported on the upper frame and piercing the center of the head of the workpiece placed on the upper piercing die A piercing forming unit configured to form a piercing hole;
A lower trimming mold supported on the lower frame and having a workpiece routed through the plating forming section, and an upper trimming mold supported on the upper frame and trimming the head of the workpiece placed on the lower trimming mold A trimming molding part;
A lower balancing die supported on the lower frame and having a workpiece routed through the piercing and trimming molding portions, and a lower balancing die supported on the upper frame and adapted to process a head of the workpiece placed on the upper balancing die, And a balancing forming part made up of a metal mold. ≪ RTI ID = 0.0 > 11. < / RTI >
The method according to claim 1,
The upper piercing die includes:
A fixing part fixed to the upper frame, an elastic part having a punch through hole coupled to a lower surface of the fixing part through a spring and formed in an upper and lower part, and an elastic part coupled to a lower surface of the fixing part and passing through the punch through hole Wherein the punch is made of punches.
The method according to claim 1,
Wherein the lower trimming mold comprises:
A fixing portion fixed to the lower frame, and an elastic portion coupled to an upper surface of the fixing portion through a spring and having a trimming knife on an upper surface thereof.
4. The method according to any one of claims 1 to 3,
Further comprising a workpiece transfer device for moving said workpiece between said plating forming portion, said piercing forming portion, said trimming forming portion and said balancing forming portion, and a local heating press for manufacturing a pull ring for a vehicle equipment.
5. The method of claim 4,
The workpiece conveying device includes:
A sub rail in which an upper end portion is connected to the main rail at a position of the plating forming portion, the piercing forming portion, the trimming forming portion and the balancing forming portion of the main rail, A guide rail composed of a spring;
A plurality of workpiece support members fitted to the guide rails and receiving a shank end of the workpiece; And
And a driving member for circulating the workpiece support member along the guide rails.

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