JP3170236B2 - Billet feeder for forging press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a billet supply device for supplying a billet as a workpiece to a forging press.

[0002]

BACKGROUND ART For example, a forging press machine A with the transfer feed device, Fig. 1, with reference to FIG. 2, each press position P ₁ on the lower die _{Q, P 2, P 3,} P 4, P ₅
By repeating the operation of grasping and releasing the billet b with the finger e of the beam F that moves up, down, left and right and back and forth of the transfer feed device, the billet b is sequentially shifted to each of the press positions P _1. And press working. At this time, the front position (the position where no press processing is performed) P ₀
Or is supplied billet b in the press position P _1, the press complete article from the press position P ₅ is (are paid out) carried away. The carry-out is transferred to a conveyor by an appropriate means and transferred to a required position.

In such a forging press A, when the billet b is fed (supplied) to the front position P ₀ or the first press position P ₁ (transfer position), the transfer means such as the chute and the conveyer C use space. Not only the relationship,
It cannot respond to the positioning (set) accuracy, the correspondence to each feeding posture of the billet b, and the like. For this reason, conventionally, a separate billet supply device B is installed beside the press machine A, and the billet b is sent from an induction heater to a predetermined position (receiving position) D by a conveyor C, for example. b is the delivery position P ₀ , P ₁
Has been moved (set).

The billet supply apparatus B has a certain level of performance as a general-purpose model to support not only one kind of forging press A but also various forging presses A under today's high-mix low-volume production. Further, in order to stabilize the product accuracy of the press machine A or to improve the yield rate, it is required to improve the supply position accuracy of the billet b and appropriately respond to each feeding posture of the billet b.

In order to meet this demand, in general, the apparatus must be large in size, and a high degree of control is required in order to respond to high speed and high precision for precision forging.
This high speed and high precision equipment is economically advantageous because it is unavoidable that the price is high, the driving operation is difficult, and the precision cannot be maintained without sufficient maintenance at all times. Hard to say.

Under these circumstances, as an inexpensive supply device B corresponding to one or several types of forging presses A, Japanese Utility Model Laid-Open No. 58-33128 (Japanese Patent Publication No.
In Japanese Patent No. 5146 (Publication 2) and the like, a billet receiver is moved from a receiving position D to a transfer position P ₀ by an air cylinder.
Linearly moved to P _1, apparatus for supplying billets b forging press machine A is disclosed.

[0007]

In today's multi-product small-lot production, for example, when a single forging press A is used for multi-product forging, the die Q is changed based on each product. , The delivery positions P ₀ and P ₁ may change up and down.

[0008] The conventional feeding device B for linearly moving the billet receiver described in the above-mentioned publications and the like has a horizontal direction (front and rear).
The moving direction is fixed even if the moving direction is only the moving direction or the moving direction is inclined. That is, even if the amount of movement in the fixed direction can be adjusted, it is not possible to cope with a case where the delivery position shifts up and down from the movement locus. It is a so-called single product type and is not suitable for multi-product small-lot production.

[0009] Further, even though this kind of inexpensive billet supply device B is used, precision forging requires a supply position accuracy, and linear movement by an air cylinder requires a rear end position (a contraction position of a piston rod) and a front end position. (Extended position of the piston rod) is fixed, so that the billet supply position P
_0, P is no flexibility in the _1, poor accuracy of positional accuracy, it is difficult to meet the demands of the precision forging.

[0010] In this precision forging, the positional accuracy of the billet supply to the first step P ₁ is required, the first step P
₁ is a busting work referred to colloquially, the variation in the plan view of the busting position occurs, the molding process P ₂ to P ₅
This is because there is a risk that the appearance of the outer burrs will vary and the molded product will be underfilled, and furthermore, the manner of the outer burrs will vary and the thickness of the molded product will vary. Also, in order to improve the product yield, it is necessary to minimize the amount of external burrs. That is, it is not possible to meet the demands of today's forging processing of high-mix low-volume production, high speed, and precision forging.

If the moving speed is not reduced before the positions (delivery positions) P ₀ and P ₁ for supplying the billet b, the billet b may fall (fall). It is difficult to control the speed, you need to install a pneumatic device such as a speed controller as an adjustable method, which leads to cost increase,
Problems remain in terms of accuracy.

As a technique for solving the movement by the air cylinder, the above publication 2 discloses a billet movement technique using a rack and pinion mechanism.

However, in this technique, despite the control of the position accuracy by the servomotor, the backlash of the gear becomes fatal due to the meshing of the rack and pinion, and as a result of long-time operation, wear progresses. As a result, the variation in position accuracy is increased. In addition, a speed reducer is required to reduce the rotation of the pinion.

It is a first object of the present invention to make it possible to cope with a change in the delivery position even when the billet receiver is moved linearly, and to reduce the cost and improve the accuracy of the billet supply position. 2 issues.

[0015]

In order to solve the above-mentioned first problem, the present invention provides a receiving position where a billet is conveyed by the above-mentioned chute, conveyor and the like, and a billet transferring position of a forging press machine. In a device for linearly reciprocating a billet receiver, carrying the billet from the receiving position to the transfer position, and supplying the billet to the forging press, first, it is assumed that the transfer position of the forging press is changed up and down. That is, assuming that there is a height difference between the receiving position and the transfer position, the inclination of the billet receiver in the linear motion direction can be adjusted, and the length of the linear motion can also be adjusted.

If the inclination of the billet receiver in the linear movement direction can be adjusted, the inclination can be adjusted to cope with a change in the vertical direction (height) of the delivery position. The change in the horizontal direction and the transfer position in the horizontal direction due to the change is handled by adjusting the length of the linear movement.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a concrete form of adjusting the inclination of the billet receiver in the direction of linear movement and adjusting the movement length thereof, the billet receiver is linearly moved between the receiving position and the transfer position by a ball screw mechanism. And the casing of the ball screw mechanism is rotatably supported in the vertical direction at one point in the length direction, and the other point of the casing is supported on the fixed body via the telescopic mechanism. Then, the casing is swung by the expansion and contraction mechanism,
A configuration in which the inclination in the linear motion direction is adjusted may be employed.

The ball screw mechanism does not have a backlash like the meshing of a rack and a pinion, is hardly worn, is easily controlled in moving speed, and can obtain high moving accuracy. In addition, since this mechanism has a deceleration function by itself, a speed reducer is not required for speed control, and a general-purpose product can be adopted, which can be inexpensive. That is, the ball screw mechanism solves the second problem.

As described above, from the viewpoint that the ball screw mechanism is advantageous, it is preferable that the expansion / contraction mechanism is also a ball screw mechanism.

As a more specific embodiment of the invention in which the billet receiver is moved linearly by a ball screw mechanism, bearings are provided at the front and rear inside the casing, and the ball screw driven by the servo motor is rotatable by both bearings. A ball nut screwed to the ball screw is fixed to a slide plate extending in the front-rear direction in the casing, the slide plate protrudes from the front end of the casing, and the billet receiver is provided at the tip thereof, and The slide plate may be configured to be slidably supported by the casing before and after the ball nut.

In this configuration, a ball screw mechanism is formed by the ball screw and the ball nut, and the rotation of the ball screw causes the slide plate to enter and exit from the end face of the casing, and the billet receiver reciprocates between the receiving position and the transferring position. ,
The billet is supplied to a forging press. During this operation, since the slide plate is supported by the casing before and after the ball nut, the influence of the bending load by the billet receiver or the like on the ball nut is small, and the ball screw mechanism also works smoothly.

[0022]

1 is a schematic plan view of one embodiment, FIG. 2 is a schematic front view of the embodiment, and FIG. 3 is a side sectional view of the driving section.

The billet supply device B of this embodiment is installed on the side of the forging press A as in the prior art, and the billet b is sent from the induction heater to the receiving position D on the conveyor C as indicated by an arrow. . At this position D, the billet supply device B receives the billet b and sets it at the front position P ₀ of the forging press A.

The conveyor C is provided with each chain link 11
A flat slat plate 12 is attached to each of the slat plates 12, and a plate 13 is welded to each slat plate 12 in a mountain shape to form a mountain-shaped ridge (slat) 14 in the width direction of the conveyor. Between these ridges 14, the slopes of the ridges 14 face each other and V
A groove having a V-shape is formed, and this groove serves as a mounting portion for the billet b. The V-shape allows the conveyor C to smoothly transport the billet b without being affected by a change in the diameter of the billet b.

The billet supply device B is provided on the side of the forging press A, and receives the billet b from the receiving position D to the receiving position P ₀ by a ball screw mechanism.
Is moved linearly. The ball screw mechanism includes a ball screw 21 and a ball nut 22 and is provided in a rectangular box-shaped casing 23. The ball screw 21 is rotatably supported by a casing 23 by front and rear bearings 24, 24 and is connected to a servomotor M via a coupling 25.

The ball nut 22 is fixed to a slide plate 26, and a billet receiver 20 is provided at the tip of the slide plate 26. The slide plate 26 is movable in the longitudinal direction of the casing 23 via the linear guide 27, and when the ball screw 21 is rotated by the servo motor M, the slide plate 26 moves back and forth via the ball nut 22. and reciprocates between the positions D and delivery position P ₀ receives the billet receiving 20.

The linear guide 27 is composed of a rail 27a fixed to the casing 23 and a slider 27b sliding on the rail 27a. Has become.
The slider 27b is located at the front and rear positions of the ball nut 22, and the influence of bending stress by the billet receiver 20 and the like on the ball nut 22 is reduced. Both sliders 27b, 2
7b is preferably in a symmetrical position with respect to the ball nut 22. The linear guide 27 may have a configuration in which the rail 27a is provided on the slide plate 26 and the slider 26b is provided on the casing 23 side. In this case, the slider 27b is provided on the front side in the casing 23. In addition, the ball nut 22 can be movable to a casing 23 via a linear guide 27 on a side portion thereof as shown in FIG.

Side plates 28 are provided on both sides of the slide plate 26 for reinforcement.
A bellows-like sheet 29 is stretched around an area between the upper edge of the front end and the upper edge of the mounting plate 20a of the billet receiver 20, and this sheet 29 suppresses intrusion of dust into the ball screw mechanism (the casing 23). .

The casing 23 is supported by a pin connection 30 at the front end and the middle of the casing 23.
0 is supported by the ball screw mechanism 31 of the servo motor M ₁ drives. Servomotor M ₁ is post 3 of the press A
2, the output shaft of which is swingably supported by a ball screw 31 a of a ball screw mechanism 31 via a ball joint 33. The ball screw mechanism 31 includes a ball screw 31 fixed to a ball nut 31c fixed to a casing 31b.
has been passed a screw and a servo motor M ₁ ball screw 31a rotates, the ball screw mechanism 31 expands and contracts with retractable ball screw 31a is to housing 31b, the casing 23 (the billet supply device B) is It swings up and down with the tip pin joint 30 as a fulcrum. This swinging, receiving position D and a delivery position P ₀ is displaced vertically.

In this embodiment, the billet b sent from the conveyor C to the receiving position D is received by the receiver 20 at the position D, and is driven by the servo motor M to form a slide plate as shown by a chain line. 26 is moved to move the billet receiving 20 to the transfer position P _0. The billet b at the delivery position P ₀ is sandwiched by the fingers e, and is sequentially shifted to each of the press positions P ₁ . The receiver 20 to which the billet b has been transferred is retracted by the rotation of the servomotor M and returns to the receiving position D. The above actions are repeated,
Billet b is sent from the receiving position D to the transfer position P _0.

At this time, since the billet receiver 20 is opened upward, the applicable range for the change in billet diameter is wide. Further, since the mechanism of the ball screw mechanism and the mechanism of the linear guide have precise feeding accuracy as is well known, the performance of the servo motor M can be maximized. For this reason, it is easy to control the adjustment of the position of the billet receiver 20, the adjustment of the feed speed, and the like to the optimum ones for the working conditions.

By changing the diameter of the billet b, changing the mold Q, etc., the receiving position D and the transferring position P ₀ of the billet b are changed.
There if displaced, with swings the casing 23 by appropriately drives the servo motor M _1, by changing the moving end position of the billet receiving 20, corresponding to the displacement. At this time, the receiving position D is also displaced, but the rear end position of the movement of the billet receiver 20 is changed to respond to the change, and since the billet receiver 20 is open upward, the displacement can be absorbed to receive the billet b. . If the billet cannot be absorbed, it is replaced with a billet receiver 20 having a size and shape corresponding to the position D. As described above, after the moving position of the billet receiver 20 is determined by changing the diameter of the billet b and changing the mold Q, an appropriate position is determined, and the billet b is linked with the press operation.
Is supplied.

FIGS. 4 and 5 show another embodiment. FIG. 5 is a schematic front view, and FIG. 6 is a cut-away right side view of the drive unit. In place of the ball screw mechanism for linear movement described above, a pinion rack mechanism is employed.

That is, a slide plate 26 having a billet receiver 20 is provided in a casing 23 via a linear guide 27 so as to be movable in its length direction.
6 is provided with a rack 41, and a pinion 42 meshing with the rack 41 is rotated by a servo motor M via a speed reducer E. In the figure, 43 is a bearing.

In this embodiment, when the pinion 42 is turned by the servo motor M, the billet receiving 2
0 reciprocates between the receiving position D and the transferring position P ₀ , and transfers the billet b from the conveyor C to the finger e.

As in the embodiment, the billet receiver 20 can be not only a simple receiving shape with an open top, but also a clamp type for gripping the billet b. If it is a clamp type, it may be downward. For this downward clamping, by a horizontal position on the receiving level of the linear movement of the fingers e of the billet receiving 20, it is possible to change the delivery position of the billet receiving 20 from P ₀ to P _1.

[0037]

According to the present invention, the inclination of the billet receiver in the linear movement direction and the length of the movement can be adjusted, so that even in an inexpensive billet supply device, it is possible to appropriately cope with the displacement of the billet transfer position. I can do it.

Further, since the inclination and the movement length are adjusted by the ball screw mechanism, the size and the simplification can be achieved, which is economical, and is suitable for high speed operation and handling. It can be simple and the adjustment accuracy is high.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of one embodiment.

FIG. 2 is a schematic front view of the embodiment.

3A and 3B are cross-sectional views of main parts of the embodiment. FIG. 3A is a front support portion of the ball screw in FIG. 2, FIG. 3B is a rear support portion of FIG.
Is another example.

FIG. 4 is a schematic front view of another embodiment.

FIG. 5 is a sectional view of a main part of the embodiment.

[Explanation of symbols]

A forging press machine B billet feeder C Conveyor D billet receiving position P _0, P ₁ billet delivery position P ₁ to P ₅ press position b billet 20 billet receiver 21 Ball screw 22 Ball nut 23 casing 26 slide plate 27 Linear guide 30 pins Coupling part 31 Ball screw mechanism 31a Ball screw 31c Ball nut 41 Rack 42 Pinion M, M ₁ Servo motor

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-11-123496 (JP, A) JP-A-5-92228 (JP, A) JP-A-6-304690 (JP, A) JP-A-3-3 180237 (JP, A) Japanese Utility Model Showa 58-33128 (JP, U) Japanese Utility Model Utility Model Hei 3-95146 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21J 1/00-13 / 14 B21J 17/00-19/04 B21K 1/00-31/00

Claims (4)

(57) [Claims] 1. A receiving position D where a billet b is conveyed by a chute, a conveyor C or the like, and a forging press A.
There is a height difference between the billet transfer positions P ₀ and P ₁ , and the billet receiver 20 is linearly reciprocated between the two positions D, P ₀ and P ₁ to move the billet b to the receiving position. In the device for transferring from D to the transfer positions P ₀ and P ₁ and supplying it to the forging press A, the inclination of the billet receiver 20 in the linear motion direction can be adjusted, and the length of the linear motion can also be adjusted. A billet supply device for a forging press machine. The method according to claim 2, wherein said billet receiving 20, so as to linearly move between the receiving position D and the transfer position P _0, P ₁ by a ball screw mechanism, and a casing that length of the ball screw mechanism At one point in the vertical direction, the other end of the casing is supported by a fixed object via a telescopic mechanism, and the casing is oscillated by the telescopic mechanism. The billet supply device for a forging press according to claim 1, wherein the degree is adjustable. 3. The billet supply device of a forging press according to claim 2, wherein the front and rear bearings in the casing 23 are provided.
4 and 24, a ball screw 21 driven by a servomotor is rotatably supported by the two bearings 24, 24, and a ball nut 22 screwed to the ball screw 21 extends in the front-rear direction within the casing 23. 26, the slide plate 26 projects from the front end of the casing 23, and the billet receiver 20 is provided at the end thereof. The slide plate 26 is slidable on the casing 23 before and after the ball nut 22. A billet supply device for a forging press, which is supported. 4. The billet supply device for a forging press according to claim 2, wherein the expansion and contraction mechanism is formed by a ball screw mechanism.