KR20110004057A - Cam unit support system of transformer - Google Patents

Abstract

 The cam unit fixing system of the multi-stage forging machine according to the present invention includes a cam shaft having a flow path formed therein, a piston 50 axially movable to the cam shaft, and having a flow path communicating with the flow path of the cam shaft. Including a cylinder 60 for supporting the piston in a direction opposite to the pressing direction of the piston by the elastic pressing means fixedly mounted to the front end of the cam shaft to apply an elastic pressure to the piston in one direction; Is done.

 The elastic pressing means is fixed to the camshaft, and comprises a cap nut 70 fixedly connected to the cylinder, and a spring member 72 embedded in each spring groove of the cap nut to apply an elastic pressing force to the piston side.

 According to the present invention as described above, the pressure opposite to the pressing force of the elastic pressing means is applied to the piston by the pressure of the hydraulic oil supplied between the cylinder and the cylinder through the flow path of the piston, so that the pressing force of the elastic pressing means is canceled and the cam by the piston The pressure lock of the unit is selectively released.

 Therefore, since the cam unit is stably fixed by the spring member, the power consumption required for the operation of the forging molding machine is saved, and the maintenance difficulty of the hydraulic supply device is greatly reduced.

Description

Cam unit support system of multi-stage forging machine

The present invention is to provide a cam unit fixing system of a multi-stage forging machine to ensure that the fixing operation of the cam unit is made stable and efficient.

The multi-stage forging machine is for molding various parts such as bolts and nuts, and includes a molding unit for directly forging a step for forming a product, a transfer unit for transferring a product to each step from the molding unit, and the molding unit and the transfer unit. It consists of a driving means for linkage driving.

Here, the molding unit is installed to face the die block 10, the plurality of die 12 and the die block 10 arranged in front of the die block 10, as shown in FIG. And a ram 16 provided with the same number of punches 14 corresponding to the die 12.

As shown in FIG. 2, the transfer unit is supported by the chuck block 20 installed above the die block 10 and the chuck block 20 so as to be slidably movable, and at the same time by each driving lever 22. The chuck frame 24 reciprocated in the parallel direction of 12) and the chuck frame 24 are mounted on the front surface of the chuck frame 24 to reciprocate in front of the die 12 and perform the opening and closing operation according to the operation of the chuck frame 24. It consists of a plurality of chuck mechanism (26).

The chuck mechanism 26 is installed on the front of the chuck frame 24, as shown in Figure 3, each pair of fingers 262 and rotatably supported by the support shaft 261, and each of the support shaft ( It consists of a pair of sector gears 263 meshed with each other in a state of being fixedly fitted in the middle portion 261, and an eccentric roller 264 attached to the rear end of one support shaft 261.

In the chuck block 22, a cam shaft 28 rotating in synchronization with the movement of the punch 14 moving forward and backward toward the dies 12, and a plurality of cam units 281 provided on the cam shaft 28. And a cam ball for opening and closing the finger 262 of each chuck mechanism 26 by rotating the support shaft 261 through the eccentric roller 264 as it swings along with the rotation of the cam unit 281 ( 29).

The driving means includes a drive motor 30 generating power, a crank shaft 34 connected by the drive motor 30 and the belt 32, and the rotational force of the crank shaft 34 to the ram 16. It comprises a crank rod 36 to transmit, and a drive shaft 38 for transmitting the rotational force of the crank shaft 34 to the drive lever 20.

According to the conventional multi-stage forging machine, the power of the drive motor 30 is transmitted to the crankshaft 34 through the belt 32, so that the crankshaft 34 rotates, and the crank rod 34 rotates as the crankshaft 34 rotates. The ram 16 is moved back and forth by the 36, so that each punch 14 provided in the ram 16 moves back and forth with respect to the die 12, thereby combining the die 12 and the punch 14. By the action, the material is molded.

Here, the raw materials are sequentially processed while being transferred from one forging station to the other forging station, that is, a combination of the die 12 and the punch 14 corresponding to each other, and the transfer operation is performed by the transfer unit.

That is, the chuck frame 24 slidably installed in the chuck block 20 reciprocates in synchronization with the back and forth movement of the ram 16, so that the finger 12 of the chuck mechanism 26 is adjacent to the die 12. In the movement process, the cam unit 281 and the cam ball 29 and the roller 264 are rotated by the cam shaft 28 in the movement process, the finger 262 is opened and closed by the operation of one side material It is to be sequentially moved from station to the other station.

On the other hand, in order to manufacture a product having a different shape using one forging machine, it is necessary to adjust the opening and closing timing of the chuck mechanism 26 according to the shape of the product.

Each cam unit 281 is composed of a combination of a pair of cam plate configured so that the phase can be adjusted to each other, it is fixed to the angle adjustable by a hydraulic cam fixing system.

As an example of such a hydraulic cam fixing system, Korean Utility Model Publication No. 1996-0002331 discloses a hydraulic cylinder 40 mounted in a form fitted to a cam shaft 28, and a cam shaft 28 inside the hydraulic cylinder 40. A hydraulic pressure supply device 44 for supplying hydraulic oil to the hydraulic cylinder 40 and controlling the pressure through a flow path formed in the cam shaft 28 and a piston 42 fitted to the cam shaft 28. Disclosed is a technique configured to include.

According to this prior art, the drawing oil is supplied to the hydraulic cylinder 40 by the hydraulic supply device 44, and the piston 42 is pressed in one direction of the camshaft 28 by the pressure of the supplied hydraulic oil, thereby causing the piston 42 ) Is to press fix each cam unit 281 arranged in parallel on the cam shaft 28 as a whole.

Therefore, according to the related art, if necessary, the supply pressure of the hydraulic oil is reduced through the hydraulic supply device 44 or the supply of the hydraulic oil is stopped, so that the pressing action of each cam unit 281 of the piston 42 is weakened or stopped. By allowing the cam unit 281 to rotate, the cam unit 281 may be rotated to adjust the opening and closing timing of the chuck mechanism 26.

On the other hand, according to the prior art, it is necessary to maintain the supply pressure (hydraulic pressure) of the hydraulic oil to a certain value at all times during the operation of the forging machine, so that the pressing action to the cam unit 281 is continued, the hydraulic pressure supply device 44 If the hydraulic pressure is dropped due to abnormalities, the cam unit 281 is not fixed, so that the operation of the forging molding machine becomes impossible.

Therefore, in the prior art, it can be seen that the hydraulic supply device 44 plays an essential role for the operation of the forging machine, and in this characteristic, the hydraulic supply device 44 as well as the power required for the operation of the forging machine for operation of the forging machine. Power is also consumed for the operation of, there is a problem in use that must pay more attention to the maintenance of the hydraulic supply (44).

The present invention is to provide a cam unit fixing system of a multi-stage forging machine, which is intended to solve the conventional problems as described above, so that the operation for fixing the cam unit is performed stably without the hydraulic supply device.

The cam unit fixing system of the multi-stage forging machine according to the present invention includes a cam shaft having a flow path formed therein, a piston which is axially movable to the cam shaft, and has a flow passage communicating with the flow path of the cam shaft. An elastic pressing means fixedly mounted to the tip of the camshaft to apply elastic pressure to the piston in one direction, and a cylinder supporting the piston in a direction opposite to the pressing direction of the piston by the elastic pressing means. .

The elastic pressing means has a center hole is formed in the center, a plurality of spring grooves are formed around the center hole at equal intervals fixed to the cam shaft penetrating through the center hole, and the cap nut is fixed to the cylinder and And a spring member embedded in each spring groove of the cap nut to apply an elastic compression force to the piston side.

The spring member is composed of a plurality of plate springs laminated and combined.

The piston consists of a small diameter portion having a small diameter, a large diameter portion having a relatively larger diameter than the small diameter portion, the cylinder is a small diameter portion into which the small diameter portion of the piston is inserted, and a large diameter portion into which the large diameter portion of the piston is inserted. Is done.

The large diameter portion of the piston is supported in a direction opposite to the spring member by the small diameter portion of the cylinder, and the flow path of the piston is formed in the large diameter portion to open toward the small diameter portion of the cylinder.

According to the cam unit fixing system of the multi-stage forging machine according to the present invention as described above, since the operation for fixing the cam unit is made stable by the spring member and not by the hydraulic supply device, the power consumption required for the operation of the forging machine is saved. In this case, the maintenance difficulty of the hydraulic supply device is greatly reduced.

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

The cam unit fixing system of the multi-stage forging machine according to the present invention includes a cam shaft 28 having a flow path 28a for supplying hydraulic oil therein and a cam shaft 28 as shown in FIG. A piston 50 is axially movable and is fixedly mounted to a front end of the cam shaft 28 and a piston 50 having a flow passage communicating with a flow path of the cam shaft 28, and being disposed on one side with respect to the piston 50. And an elastic pressing means for applying elastic pressure in the direction, and a cylinder 60 supporting the piston 50 in a direction opposite to the pressing direction of the piston 50 by the elastic pressing means.

The flow path 28a of the camshaft 28 is formed in a form extending from the one end of the camshaft 28 along the center axis to the inside, and is bent vertically toward the outer circumferential surface at a position drawn into the camshaft 28 by a predetermined distance. do.

The elastic pressing means is composed of a cap nut 70 fixed to the front end of the cam shaft 28, and a spring member provided on the cap nut 70.

As shown in FIG. 6, the cap nut 70 has a center hole 70a through which the cam shaft 28 penetrates, and a plurality of spring grooves 70b are spaced around the center hole 70a. The spring member 72 is formed of a plurality of plate springs 721 which are built-in and laminated in each spring groove 70b of the cap nut 70.

The dish spring 721 is entirely fixed by a bushing 74 fitted into the spring groove 70b in a state of being embedded in the spring groove 70b, and through the head portion 741 of the bushing 74. Will press (50).

The piston 50 is composed of a small diameter portion 501 having a small diameter and a large diameter portion 502 having a relatively larger diameter than the small diameter portion 501, and the cylinder 60 has a small diameter of the piston 50. It consists of the small diameter part 601 into which the neck part 501 is inserted, and the large diameter part 602 into which the large diameter part 502 of the piston 50 is inserted. (Refer FIG. 7A, 7B).

In the state where the piston 50 and the cylinder 60 are coupled, the large diameter portion 502 of the piston 50 is in contact with the side surface of the small diameter portion 601 of the cylinder 60 to face the spring member 72. Will be supported.

The flow passage 50a of the piston 50 is formed in the large diameter portion 502. The cross-sectional view of the piston 50 communicates with the flow passage 28a of the camshaft 28 and continues vertically, bending the small diameter portion 601 of the cylinder 60. It extends in the horizontal direction toward the (), and is made in the form of opening (開口) toward the small diameter portion 601 of the cylinder 60 at the end.

The cylinder 60 has a small diameter portion 601 is coupled to the bearing 82 and rotatably supported by the cam bracket 80, the piston 50 between the front end of the piston 50 and the cam unit 281 And a bush 84 for preventing friction due to direct contact with the cam unit 281.

Referring to the operation of the cam unit fixing system according to the present invention configured as described above are as follows.

First, in a work process in which a product is molded by a forging molding machine, as shown in FIG. 7A, the piston 50 is pushed by an elastic pressing force applied from the spring member 72 to the piston 50 side, and one side thereof is pushed. One side of the cam unit 281 is pressed, and thus a plurality of cam units provided in parallel on the cam shaft 28 are maintained in a fixed state.

This action is such that the piston 50 is movably installed within the cylinder 60 within the axially limited range along the camshaft 28, while the spring member 72 has the camshaft 28 and the fixed cap nut ( This is because the elastic repulsive force of the spring member 72 is applied to the piston 50 because it is supported by 70).

On the other hand, if it is necessary to adjust the installation angle of the cam unit 281 for reasons such as producing a product of a different shape, the hydraulic pressure of the degree that exceeds the pressing force of the spring member 72 to the piston 50 is applied. As a result, the pressing action of the cam unit 281 by the piston 50 is stopped.

That is, as shown in FIG. 7B, the hydraulic oil supplied to the camshaft 28 flows into the flow passage 50a of the piston 50 in communication with the flow passage 28a of the camshaft 28, so that the tip thereof moves toward the cylinder 60. The hydraulic pressure is applied to the cylinder 60 due to the nature of the open passage of the piston 50, and the piston 50 is relatively applied by the hydraulic pressure applied to the cylinder 60 in a structure where the cylinder 60 and the cap nut 70 are fixed. ) Is the opposite of the pressing direction of the spring member 72 is to release the fixed state of the cam unit (281).

In this case, a gap is formed between the piston 50 and the bush 84 due to the positional movement of the piston 50, thereby allowing the cam unit 281 to move.

As described above, according to the present invention, it is not necessary to continuously apply strong hydraulic pressure to fix the cam unit 281 during the operation of the forging machine because the operation of fixing the cam unit 281 is performed by the spring member 72. Only when the angle of the cam unit 281 is adjusted, hydraulic pressure is applied to release the fixed state of the cam unit 281.

Therefore, according to the present invention, since the hydraulic supply device 44 does not need to be operated together during the operation of the forging machine, consequently, the power consumption required to operate the forging machine is saved, and the hydraulic supply device 44 is maintained. Management difficulties are greatly reduced.

In addition, according to the present invention, the spring member 72 for elastically compressing the piston 50 is laminated in combination, and the pressing strength of the cam unit 281 may be varied by varying the number of stacks of the disc springs 721. Will be.

1 is a schematic plan view showing the configuration of a general multi-stage forging machine.

Figure 2 is a front view showing a transfer unit of a conventional multi-stage forging machine.

3 is a cross-sectional view showing the configuration of a transfer unit of a conventional multi-stage forging machine.

Figure 4 is a cross-sectional view showing a cam unit fixing system of the multi-stage forging machine according to the prior art.

5 is a cross-sectional view showing a cam unit fixing system of the multi-stage forging machine according to the present invention.

Figure 6 is a perspective view showing a cap nut and a spring member applied to the cam unit fixing system according to the present invention.

7A and 7B are exemplary cross-sectional views sequentially illustrating an operation process of the cam unit fixing system according to the present invention.

<Explanation of symbols for the main parts of the drawings>

28: camshaft 28a: euro

281: cam unit 44: hydraulic supply device

50: piston 50a: flow path

60: cylinder 70: cap nut

72: spring member

Claims (4)

A cam shaft having a flow path formed therein, A piston axially movable to the camshaft and having a flow passage communicating therewith with the flow path of the camshaft; Elastic pressing means fixedly mounted to the tip of the camshaft to apply elastic pressure to the piston in one direction; A cylinder supporting the piston in a direction opposite to the pressing direction of the piston by the elastic pressing means By being made, including A piston is elastically pressed by the elastic pressing means to press fix a plurality of cam units mounted in parallel on the camshaft, The pressure opposing the pressing force of the elastic pressing means is applied to the piston by the supply pressure of the hydraulic oil supplied between the cylinder and the cylinder through the flow path of the piston, so that the pressing force of the elastic pressing means is canceled to press the cam unit by the piston. With fixed state selectively released  Cam unit fixing system of the multi-stage forging machine, characterized in that the. The method of claim 1, The elastic pressing means A center hole is formed in the center, and a plurality of spring grooves are formed at equal intervals around the center hole and fixed to a cam shaft penetrating through the center hole and fixedly connected to the cylinder; Spring members embedded in each spring groove of the cap nut to apply an elastic pressure to the piston side Cam unit fixing system of the multi-stage forging machine comprising a. The method of claim 2, The spring member is composed of a plurality of plate springs laminated combination Cam unit fixing system of the multi-stage forging machine, characterized in that the. The method of claim 2, The piston consists of a small diameter portion having a small diameter and a large diameter portion having a relatively larger diameter than the small diameter portion, The cylinder consists of a small diameter portion into which the small diameter portion of the piston is inserted, and a large diameter portion into which the large diameter portion of the piston is inserted, The large diameter portion of the piston is supported by the small diameter portion of the cylinder in a direction opposite to the spring member. The flow path of the piston is formed in a large diameter portion to be formed in the form of opening toward the small diameter portion of the cylinder Cam unit fixing system of the multi-stage forging machine, characterized in that the.

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