JP2003053477A - Transfer feeder for forging press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer feeder which is capable of performing high-speed conveyance by shortening the time from an induction heater to the die striking in a press. SOLUTION: The transfer feeder equipped with front and rear feed bars 1 and 2 arranged in front and rear of multistage dies of a forging press and a clamping device 30 for opening and closing both consists of a slide guide which intersects orthogonally with the front and rear feed bars 1 and 2 and guides a front supporting member 41 and rear supporting member 42 in clamping and unclamping directions, a ball screw mechanism 31 which is provided with a screw shaft 31a in parallel to the front and rear feed bars 1 and 2, a servo motor 35 which is attached to one end of the screw shaft 31a, a front connecting link 33 which is freely rotatably attached at one end to a nut 31b and is freely rotatably attached at the other end to the front supporting member 41 and a rear connecting link 34 which is freely rotatably attached at one end to a nut 31b and is freely rotatably attached at the other end to the rear supporting member 42.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a transfer feeder in a forging press. The transfer feeder is a multi-step die that operates by three-dimensional motions of a feed bar provided before and after the multi-step die in the press, namely, clamp, lift, advance, down, unclamp, and return. It is a device that conveys materials (forged products) between them.

[0002]

2. Description of the Related Art A transfer feeder in a conventional forging press will be described with reference to FIGS. FIG. 5 is a plan view of a conventional transfer feeder, FIG. 6 is a front view of the transfer feeder, and FIG. 7 is a side view of the transfer feeder. 5 to 7, 1 is a front feed bar, and 2 is a rear feed bar. Each feed bar 1,2
Although not shown in the figure, a number of fingers for grasping the material are attached according to the number of molds of the multi-step mold. Reference numeral 5 is a base frame on the base end side of the transfer feeder, and 6 is a base frame on the front end side. These base frames 5 and 6 are fixed in the space above the lower die of the forging press. Reference numeral 7 is an elevating frame on the base end side of the transfer feeder, and 8 is an elevating frame on the tip end side. The elevating frames 7 and 8 are attached to the base frames 5 and 6 via a slide guide 9 so as to be able to move up and down. The elevating frames 7 and 8 are connected to a screw type screwing mechanism 10A attached to the base frames 5 and 6. The two screw-type screwing mechanisms 10A, 10A for raising and lowering are driven by two servomotors M3, M3 to move the lifting frame 7,
8 is lifted, and then the feed bars 1 and 2 are lifted.
Can be brought down. A slide rail 21 in the forward / backward direction is installed on the elevating frame 7 on the base end side, and a carriage 22 moves forward / backward on the slide rail 21. On the other hand, a screw type screwing mechanism 10B for forward and backward movement is fixed to the elevating frame 7, a servo motor M4 for forward and backward movement is connected to the screw rod 11 thereof, and the nut 12 is connected to the carriage 22. There is.
Further, both feed bars 1 and 2 are connected to the carriage 22 via the connecting member 13 and the connecting arm 132 at the base end sides of the feed bars 1 and 2. Further, the tip ends of the feed bars 1 and 2 are attached to the connecting arm 132 so as to be slidable in the forward and backward directions. Therefore, when the servo motor M4 is driven, the carriage 22 is moved forward and backward,
Similarly, the pair of feed bars 1 and 2 can be advanced / returned.

The carriage 22 moves forward and backward on the elevating frame 7 and the elevating frame 8, and a slide guide 131 is installed on the carriage 22 in a direction orthogonal to the direction. A clamp device using two screw type screwing mechanisms 100C and 100D is installed on the carriage 22 in series in the width direction. This screw type screwing mechanism 100C,
The connecting members 13 and 13 are connected to the nuts 12 and 12 of the 100D, and the connecting members 13 and 13 are guided by the slide guide 131 to move in the width direction of the elevating frame 7. In addition, a connecting arm is attached to the connecting members 13 and 13.
The base ends of the feed bars 1 and 2 are connected to each other via 132 and 132. The first servomotor M1 is connected to the screw type screwing mechanism 100C for the feed bar 1, and the second servomotor M2 is connected to the screw type screwing mechanism 100D for the feed bar 2. Therefore, the pair of feed bars 1 and 2 can be clamped / unclamped by the first and second servomotors M1 and M2.

By the way, in the conventional clamp device, since the screw type screwing mechanisms 100C and 100D constituting the clamp device are constructed by arranging the right screw rod and the left screw rod in series, the length of the screw rod is It is long and the front and rear width of the transfer feeder is large.
In other words, it cannot fit inside the side opening (see Fig. 5). For example, in a 16000 KN forging press, the servo motor length is about 400 mm + right-hand screw ball screw about 500 mm + left-hand screw ball screw about 500 mm = total length 1400 mm, and the side opening length is longer than 800 mm, so the transfer feeder is inside the side opening of the press. It is impossible to fit in. Therefore, the stroke of the charging device, that is, the delivery distance of the billet from the induction heater to the inside of the press is long, and the length of the feed bar is also long.

[0005]

However, the transfer feeder is generally required to have a function of performing high-speed transfer between the induction heater and the multi-step mold in the press and stabilizing the transfer heater. The transfer feeder has the following problems. (1) In the case of hot forging, the billet is heated to about 1250 ° C and stamped in the press, but if the time from the induction heater to stamping in one step in the press is long, scale will occur and The surface accuracy will be poor. Recently, even in hot die forging products, there is a strong demand for near net shape from the viewpoint of cost reduction, and since machining has been omitted as much as possible from the forged product to the product, the surface accuracy of the forged product is also scaled. It is necessary to forge and improve the surface accuracy while it does not touch. Further, if the time until stamping is long, the billet temperature is lowered and the billet becomes hard, so that the forging load increases and the size limit of the product that can be forged also becomes small. This is not good because the billet is heated more than necessary from the viewpoint of energy saving. (2) The transfer feeder clamps the feed bars 1 and 2 installed one before and one after the press.
The forged products in each process are transported by operating in a three-dimensional motion of down, unclamp, and return. In order to stabilize the conveyance of the forged product, it is important that the feed bar does not vibrate due to this operation. However, in recent transfer feeders, the drive parts thereof are attached to the outside of the left and right side surfaces of the press as described above, and therefore the feed bars 1 and 2 are necessarily long. In addition, operating speed and acceleration are increasing due to the demand for high productivity. In such a situation, in order to keep the stable transport and to cope with the high speed, it is necessary to increase the rigidity of the feed bar, but in that case, the weight of the feed bar increases, which results in The capacity of the AC servo motor increases and the size increases.

In view of the above circumstances, the present invention shortens the time from the induction heater to stamping in the press, makes it possible to perform high-speed transfer in the multi-step die in the press, and transfer in a forging press that can operate stably. The purpose is to provide a feeder.

[0007]

A transfer feeder according to a first aspect of the present invention opens and closes a front feed bar arranged in front of a multi-step die in a forging press, a rear feed bar arranged in the rear, and front and rear feed bars thereof. A transfer feeder having a clamp device, wherein the clamp device is provided so as to be orthogonal to the front and rear feed bars, and supports both ends of a front feed bar and a rear feed bar. A slide guide for slidably guiding the rear support member in the clamp / unclamp direction, a ball screw mechanism having a screw shaft provided in parallel with the front and rear feed bars, and one end of the screw shaft of the ball screw mechanism. , A servomotor having a spindle attached, and one end rotatably attached to a nut of the ball screw mechanism, A front connecting link having an end rotatably attached to the front supporting member, and a rear connecting link having one end rotatably attached to a nut of the ball screw mechanism and the other end rotatably attached to the rear supporting member. It consists of and. In the transfer feeder according to claim 2, in the invention according to claim 1, in the front and rear connecting links, one end attached to the nut of the ball screw mechanism and the other end attached to the front and rear support members are the same. It is provided at a height, and the height is the same as the height at which the slide guide is provided.

According to the first aspect of the present invention, when the servomotor is rotated, the nut of the ball screw mechanism moves along the screw shaft, so that one ends of the front and rear connecting links also move along the screw shaft. Since the other ends of the front and rear connecting links are attached to the front and rear supporting members, the other ends of the front and rear connecting links are moved in the clamp unclamp direction along with the front and rear supporting members along the slide guide. That is, when the servo motor is rotated, the front and rear support members move in the clamp unclamping direction along the slide guides, so that the material can be unclamped by the pair of front and rear feed bars. Since the screw shaft of the ball screw mechanism is provided parallel to the front and rear feed bars, the width (length in the front-rear direction) of the transfer feeder can be shortened. As a result, it is possible to put the clamp device in the side opening of the press, and to shorten the length of the feed bar.
Therefore, the feed bar can be reduced in weight, and the transfer feeder can be operated at high speed and stably. According to the invention of claim 2, the front and rear connecting links and the slide bases of the front and rear supporting members move in the same plane. For this reason,
When the front and rear slide bases move along the slide guide, the front and rear support members are not twisted by the slide guide. In other words, since no force is applied to the front and rear support members in the direction perpendicular to the moving direction,
The resistance generated between the front and rear slide bases and the slide guide can be reduced. Therefore, the front and rear support members can be moved smoothly, and high-speed operation and stable operation of the transfer feeder can be enabled.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a plan view of a transfer feeder of the present invention, FIG. 2 is a side view of the transfer feeder,
FIG. 3 is an operation explanatory view of the clamp device 30, and FIG. 4 is a plan view showing a layout of the transfer feeder and the induction heater of the present invention.

1 to 3, reference numeral C indicates four press columns, reference numeral 1 indicates a front feed bar, and reference numeral 2 indicates a rear feed bar. Each feed bar 1,
The number of fingers for grasping the material is attached to 2 according to the number of molds of the multi-step mold. Reference numeral 5 indicates a base frame on the base end side of the transfer feeder,
Reference numeral 6 indicates a base frame on the front end side. These base frames 5 and 6 are fixed in the space above the lower die of the forging press.

Reference numeral 7 is an elevating frame on the base end side of the transfer feeder, and reference numeral 8 is an elevating frame on the tip end side. The elevating frame 7 is attached to the base frame 5 via a slide guide 9 so as to be vertically movable.
The elevating frame 8 is also attached to the base frame 6 via a slide guide 9 so as to be vertically movable. The elevating frames 7 and 8 are moved up and down by a known lifting device such as a screw type screwing mechanism attached to the base frames 5 and 6, and thus the feed bars 1 and 2 are moved up and down.

Slide rails 21 and 21 in forward and backward directions are installed on the elevating frames 7 and 8, respectively, and on the slide rails 21 and 21, the carriages 22 and 22 on the base end side and the tip end side move forward and backward. It is free. On the other hand, a well-known forward / backward movement device composed of a screw type screwing mechanism 20 is fixed to the elevating frames 7 and 8, a forward / rearward movement servomotor M4 is connected to the screw rod 11, and the nut 12 is a carriage. 22 and 22. Also,
Both feed bars 1 and 2 are provided on the carriage 22 as support members 4
They are connected via 1, 42. Therefore, when the servomotor M4 is driven, the carriage 22 can be moved forward and backward to advance and return the pair of feed bars 1 and 2.

Next, a clamp device 30 for clamping / unclamping the front and rear feed bars 1 and 2 will be described. As shown in FIG. 1, a pair of left and right clamp devices 30 are provided at the left and right ends of the front and rear feed bars 1 and 2, respectively. The pair of left and right clamp devices 30 are provided symmetrically with respect to the center axis of the forging press, and the left and right clamp devices 30 have the same configuration. Clamp device 3 provided
0 will be described as a representative.

As shown in FIGS. 1 and 2, the clamp device 30 includes a slide guide 40, front and rear support members 41,
42, ball screw mechanism 31, front and rear connecting links 33, 3
4 and a servomotor 35, and are arranged symmetrically in the front-rear direction with the screw type screw mechanism 20 interposed therebetween.

As shown in FIG. 2, a slide guide 40 is provided on the carriage 22 moving forward and backward on the elevating frame 7.
Are installed in the width direction. This slide guide 40
Is provided so as to be orthogonal to the front and rear feed bars 1 and 2, and on the slide guide 40, a front support member 41 that supports both ends of the front feed bar 1 and both ends of the rear feed bar 2 are provided. The rear supporting member 42 for supporting is slidable in the width direction. The front support member 41 includes a slide base 43 slidably fitted to the slide guide 40 and a support arm 45 hanging from the slide base 43. The lower end of the support arm 45 includes a front feed bar. 1 is attached. The rear support member 42 is composed of a slide base 44 slidably fitted in the slide guide 40 and a support arm 46 hanging from the slide base 44. The bar 2 is attached.

As shown in FIGS. 2 and 3, the slide base 43 of the front support member 41 and the rear support member 42.
A screw shaft 31 a of the ball screw mechanism 31 is provided between the slide bases 44. The screw shaft 31a is provided in parallel with the front and rear feed bars 1 and 2. The main shaft of the servomotor 35 is attached to the rear end of the screw shaft 31a.

A nut 31b of the ball screw mechanism 31,
A front connecting link 33 is attached between the slide bases 43 of the front supporting member 41. One end of the front connecting link 33 is rotatably attached to the nut 31b in the horizontal plane, and the other end thereof is attached to the slide base 4.
3 is rotatably mounted in a horizontal plane. Moreover, the front connecting link 33 has the same height at one end attached to the nut 31b and the other end attached to the slide base 43, and the height is the same as the height at which the slide guide 40 is provided. is there.

Further, the nut 31 of the ball screw mechanism 31.
A rear connecting link 34 is attached between b and the slide base 44 of the rear supporting member 42. The rear connecting link 34 has one end rotatably attached to the nut 31b in the horizontal plane and the other end rotatably attached to the slide base 44 in the horizontal plane.
Moreover, the rear connecting link 34 has the same height at one end attached to the nut 31b and the other end attached to the slide base 44, and the height is the same as the height at which the slide guide 40 is provided. is there.

Therefore, according to the clamp device 30, when the servo motor 35 is rotated, the nut 31b of the ball screw mechanism 31 moves along the screw shaft 31a, so that one ends of the front and rear connecting links 33, 34 are also screw shafts. Move along.
Since the other ends of the front and rear connecting links 33, 34 are attached to the slide bases 43, 44 of the front and rear supporting members 41, 42, the front and rear connecting links 33, 34, together with the front and rear slide bases 43, 44, It is moved in the unclamping direction along the slide guide 40.
That is, as shown in FIG. 3A, if the servo motor 35 is rotated counterclockwise, the nut of the ball screw mechanism 31 is rotated.
Since 31b moves forward along the screw shaft 31a, the slide bases 43, 44 of the front and rear support members 41, 42 move along the slide guide 40 in the clamping direction, that is, in the direction toward each other. Therefore, the front and rear feed bars 1 and 2 are also close to each other, and the material can be clamped by the front and rear feed bars 1 and 2. Conversely, FIG.
As shown in (B), if the servo motor 35 is rotated clockwise, the nut 31b of the ball screw mechanism 31 will move to the screw shaft 31.
Since it moves rearward along a, the front and rear support members 41,
The slide bases 43 and 44 of 42 are slide guides 40.
Along the unclamping direction, that is, in a direction away from each other. Therefore, the front and rear feed bars 1 and 2 are also separated from each other, and the front and rear feed bars 1 and 2 can unclamp the material.

The screw shaft 31a of the ball screw mechanism 31
However, since it is provided in parallel with the front and rear feed bars 1 and 2, the width (length in the front-rear direction) of the transfer feeder can be shortened. As a result, the clamp device 30 can be inserted into the side opening of the press, and the length of the front and rear feed bars 1 and 2 can be shortened. Therefore, the front and rear feed bars 1 and 2 can be lightened, and the transfer feeder can be operated at high speed and stably.

Moreover, the front and rear connecting links 33, 34 and the slide bases 43, 44 of the front and rear supporting members 41, 42 move in the same plane. Therefore, when the front and rear slide bases 43, 44 move along the slide guide 40, the front and rear support members 41, 41 are moved by the slide guide 40.
42 will not be damaged. That is, since no force is applied to the front and rear support members 41 and 42 in the direction perpendicular to the moving direction, the resistance generated between the front and rear slide bases 43 and 44 and the slide guide 40 can be reduced. it can. Therefore, the front and rear support members 41, 42 can be moved smoothly, and high-speed operation and stable operation of the transfer feeder can be realized.

Since the clamp device 30 as described above is adopted, the width (length in the front-rear direction) of the transfer feeder of this embodiment is short, and the transfer feeder is sandwiched between the front and rear columns C, C as shown in FIG. The transfer device can be configured by disposing the clamp device 30 in the opened side opening. As a result, the lengths of the feed bars 1 and 2 are shortened, so that the charging device 51 can be arranged closer to the press center, and the distance L between the feeding position of the entrance chute 53 and the press center is short. Become. Therefore, the following effects are obtained. (1) Induction heater 52
Since the time required to carry the product from the mold to the die in the press is shortened and the forging can be performed while the scale is attached, the surface accuracy is improved. (2) Since the temperature drop before forging is small, the forging load does not increase and it is difficult to limit the size of the product that can be forged. (3) Since the feed bars 1 and 2 are short, the weight can be reduced and the rigidity can be enhanced, so that the speed can be increased, and even if the speed is increased, stable operation can be performed without causing vibration or the like.

[0023]

According to the invention of claim 1, the width (length in the front-rear direction) of the transfer feeder can be shortened,
As a result, it is possible to put the clamp device in the side opening of the press, and to shorten the length of the feed bar. Therefore, the feed bar can be reduced in weight, and the transfer feeder can be operated at high speed and stably. According to the invention of claim 2, the front and rear support members can be moved smoothly, and high-speed operation and stable operation of the transfer feeder can be enabled.

[Brief description of drawings]

FIG. 1 is a plan view of a transfer feeder of the present invention.

FIG. 2 is a side view of the transfer feeder.

FIG. 3 is an operation explanatory view of the clamp device 30.

FIG. 4 is a plan view showing a layout of a transfer feeder and an induction heater according to the present invention.

FIG. 5 is a plan view of a conventional transfer feeder.

FIG. 6 is a front view of a conventional transfer feeder.

FIG. 7 is a side view of a conventional transfer feeder.

[Explanation of symbols]

1 front feed bar 2 Rear feed bar 30 Clamp device 31 Ball screw mechanism 31a screw shaft 31b nut 33 Previous link 34 Rear connection link 35 Servo motor 40 Slide guide 41 Rear support member 42 Front support member

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Minoru Hirose, Inventor             34-2-23 Nitta-cho, Niihama-shi, Ehime             Tomo Heavy Mechanical Engineering Service Stock Association             In-house (72) Inventor Ryo Watanabe             Sumitomo Heavy Industries, No. 5, Soukai-cho, Niihama-shi, Ehime Prefecture             Mechanical Industry Co., Ltd. Niihama Works F-term (reference) 4E087 FA01 GB01                 4E090 EA01 FA02 HA05

Claims (2)

[Claims] 1. A transfer feeder comprising a front feed bar arranged at the front of a multi-step die and a rear feed bar arranged at the rear of a forging press, and a clamp device for opening and closing the front and rear feed bars, said transfer feeder comprising: A clamp device is provided so as to be orthogonal to the front and rear feed bars, and a front support member that supports both ends of the front feed bar and a rear support member that supports both ends of the rear feed bar are disposed in the clamp / unclamp direction. A slide guide that slidably guides, a ball screw mechanism in which a screw shaft is provided in parallel with the front and rear feed bars, a servomotor having a main shaft attached to one end of the screw shaft of the ball screw mechanism, and one end A front connecting member rotatably attached to the nut of the ball screw mechanism and the other end rotatably attached to the front supporting member. Link and one end, said nut rotatably mounted on the ball screw mechanism, the other end transfer feeder in forging press, characterized by comprising a connecting link after rotatably attached to the rear support member. 2. In the front and rear connecting links, one end attached to the nut of the ball screw mechanism and the other end attached to the front and rear supporting members are provided at the same height, and the heights thereof are the same. 2. The transfer feeder in the forging press according to claim 1, wherein is the same height as the height at which the slide guide is provided.