JP3306441B2 - Material supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supplying a working material such as a forging press.

[0002]

2. Description of the Related Art In a hot forging press line, a billet, which is a processing material coming out of a heating furnace, is transported to a receiving position of a material supplying device by a transport device such as a conveyor or a chute. Forging press receiving position (referred to as "0 process")
It is generally transferred to a forging press.

Various types of material supply devices for forging press lines have been developed. As a typical example, as described in, for example, Japanese Utility Model Application Laid-Open No. 63-29641, after a billet is dropped by its own weight from a chute onto a reversing bracket of a supply device and inserted into the reversing bracket,
After the billet is supplied to the positioning bracket by the driving of the reversing cylinder, the billet is chucked by transfer, or as described in Utility Model Registration Publication No. 2574638, the billet falls from the chute to its own weight in the saucer, For example, there is a device in which a billet is supplied to a chucking position of a transfer by an operation of a lever interlocked with a beam of a transfer device.

[0004]

The length of a billet handled by this type of apparatus (upper and lower dimensions during transfer to a forging line) is generally at least 1.5 times the outer diameter. In addition, it is necessary to provide a member for preventing the billet from falling or tilting in the billet holding portion of the supply device.

For example, in the Japanese Utility Model Application Laid-Open No. 63-29641, the height of the positioning metal fittings of the end positioning part is adjusted to prevent the billet supplied by the reversing metal fittings from overturning or tilting. It is about 0.5 times the length. In addition, the above-mentioned Utility Model Registration Publication No. 257
No. 4638 describes that a billet is fitted into a saucer. In this case, too, the billet is inserted at a depth of 0.5 times the billet length in order to prevent overturning and tilting. That is all.

On the other hand, when a work is processed by a hot forging press, a billet may be vertically or horizontally driven depending on the shape of a finished product, and a circular (disk-shaped) work is formed. If you do, you're doing a vertical hit to improve the yield. In general, in a hot forging press, the work of each process is simultaneously and sequentially conveyed to the next process by an automated transfer device that performs raising and lowering, feeding reciprocating motion, and clamping and unclamping. In this type of automated transfer device, the amount of lift (lift amount) is the same for each process, and the amount of lift is determined by using a die (lower die)
From the lower die and the work during transfer. The forging die is coated with a release agent to prevent the work from adhering to the lower die and to make it easier to separate, so a gap is required between the work and the lower die. When applying the agent, foreign substances such as scales are removed from the upper surface of the lower mold by air blow at the same time, so that the work is not damaged. On the other hand, when the transferred work is lowered by the chuck of the transfer device and inserted into the lower mold of the next process, the required lowering amount is about 5 to 10 mm. is there.

In such a forging line, the billet transferred to the forging press receiving position (step 0) by the material supply device is generally received by the transfer device and transferred to the first step. . Since the billet is unprocessed and has a high height, in the case of the above-described conventional material supply device, it is necessary to considerably increase the lift of the transfer device for extracting the billet from the billet holding member. For this reason, a work that has progressed and is thinned is lifted more than necessary, and there is a problem in that useless operation is increased.

That is, when the work is disk-shaped and has a small thickness, the transfer device requires only a small amount of lift (amount for grasping and lifting the work). Therefore, speed can be increased by reducing the amount of lift. However, in each of the apparatuses described in the above publications, about half of the billet is engaged with the holding member, and in order to remove this, the engagement length or more is required. This is not preferable for speeding up the forging line. Therefore, the present invention, when transferring the billet from the supply device to the transfer device of the forging line,
It is an object to reduce the lift amount of the transfer device as much as possible.

[0009]

In order to solve the above-mentioned problems, the present invention has the following configuration. That is, the material supply device according to the present invention is a material supply device that supplies a material to be processed to a material transfer position to a forging press from a chute for work material sliding down provided at an end portion of the transfer device , A loader having a disk on which the material that has slid is placed, and a transfer device that reciprocates the loader from a material receiving position to a delivery position to the forging press, wherein the loader has a position from which the material is placed. Also a pair of open / close
An auxiliary finger for clamping is provided.
Is elastically biased in the normally closed direction,
When the material comes in contact, it is pushed open by the gravity of the material
It is characterized in that it is configured to elastically hold the material .

According to the material supply device of the present invention, the material is held by the pair of openable and closable auxiliary fingers while the material is placed on the disk of the loader, so that the holding is reliable. In addition, since the auxiliary fingers are pivotally supported on the rear side of the material in the material transfer direction, and can be freely opened and closed toward the front in the transfer direction, and elastically clamp the material,
At the time of delivery to the forging press, the auxiliary finger is opened simply by further pulling in the transport direction, so that the material can be extracted. Therefore, it is not necessary to raise the transfer device almost just to remove the held material. Even if the transfer device is raised for other reasons, the lift amount can be reduced.

It is preferable to provide the loader with an impact buffering device for absorbing the impact of the material dropped and supplied from the chute, since the material is not damaged and noise and vibration can be suppressed. . In addition, it is advantageous to be able to adjust the elastic clamping force of the auxiliary finger so that different types of materials can always be maintained at the optimum pressure.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 and the following drawings illustrate an embodiment of a material supply apparatus according to the present invention. The material supply apparatus 1 is provided in a well-known forging press line and includes a heating furnace. The billet W, which is the material to be processed heated in (not shown), is transported to the chute position of the material supply device 1 by the transport conveyor C with a cart.

The material supply device 1 includes a main body frame 2 fixed to a base, and an air cylinder 3 for driving a material transfer device (reversing device) R is supported inside the main body frame. One arm 5a of a support 5 is pivotally connected to a knuckle 4 attached to the tip of a rod 3a of the cylinder 3 by a shaft 6. The other pair of arms 5b of the support 5 is an arm for supporting a stopper member, which will be described later.

A base 7 having a shaft hole is integrally provided below the support 5, and the base 7 is rotatably attached to the extension 2 a of the main body frame 2 by a shaft 9. Therefore, if the cylinder 3 is expanded and contracted, the support 5 rotates around the axis 9 within a predetermined range. A loader bearing 13 is attached to a support 10 of the support 5. The loader bearing 13 has a shaft portion 15 of the loader 15.
a is slidably fitted.

As shown in FIG. 6, the loader 15 has a disk 16 for receiving a material having a smooth upper surface, and a part of the upper surface of the disk has an inclined surface 16a for discharging scale and foreign matter to the outside. Is formed. An annular convex portion 16b is formed on the lower surface side of the disk 16 of the loader 15. An impact buffer K is provided below the disk 16 of the loader 15. That is, a buffer spring 18 for pressing the loader 15 upward is interposed between the lower surface of the disk 16 and the member provided on the flange portion of the loader bearing 13 inside the convex portion 16b. Loader 15
The lower end of the shaft portion 15a protrudes below the loader bearing 13, and nuts N, N are screwed to this portion via washers for retaining. Therefore, even if the loader 15 is pressed upward by the spring 18, the upward movement is restricted. However, when the disk 16 is pressed downward, the spring 18 is compressed and the loader 15 moves slightly downward. For this reason, the impact when the billet falls on the disk 16 is absorbed by the spring 18. By adjusting the screw positions of the nuts N, N, the vertical position of the loader 15 can be adjusted.

A support member 17 for supporting a pair of auxiliary fingers is fixed to a position on the rear side of the disk in the transfer direction by bolts. As shown in FIGS. 4 and 6, the support member 17 is provided with a receiving portion 17a projecting forward, and an outer peripheral surface of a cylindrical billet as a material is engaged with a front edge of this portion. An arcuate recess 17b is formed, and a chamfered inclined surface is formed at the upper edge of the arcuate recess.

The left and right sides of the support member 17 below the level of the receiving portion are formed as inclined surfaces such that the rear side is closer to the center line. Also, concave portions 17c, 17c are provided to be fitted into the center portion side from the left and right inclined surfaces,
A thin contact plate 19 is provided at the bottom of these recesses. Further, a lower portion of the support member 17 above the inclined surface 16a of the disk 16 is cut out in a groove shape to form a through hole H for discharging foreign matter together with the inclined surface 16a.

A pair of left and right symmetric auxiliary fingers 20, 20 are attached to the support member 17 so as to be rotatable about shafts 21, 21. The auxiliary finger 20 is shown in FIGS.
As shown in the figure, there is provided a thin plate-shaped base portion with a shaft hole 20a perforated, and a holding portion provided integrally with the base portion by being raised on the front side of the base portion,
An arc-shaped concave portion 20b is formed on the opposing surfaces of the holding portion.
Are formed. The upper edge of the recess is a chamfered inclined surface 20c. A screw hole 20d is provided at the rear of the base, and a screw holder 22 is screwed to this portion. The thin shaft portion 22a of the screw retainer 22 fits into the recess 17c of the support member,
A spring 23 that presses the base of the auxiliary finger 20 outward is interposed between the abutment plate 19c and the large diameter portion of the screw retainer around the shaft portion 22a. This screw holder 22
The pressing force of the spring 23 can be adjusted by adjusting the screw length. Left and right pair of auxiliary fingers 2
In the closed state where the 0 concave portion 20b is on the same circumference in plan view (upper half in FIG. 4), the spring 23 is in an extended state, and the holding portion is opened outward (lower half in FIG. 4). )
In this state, the spring 23 is in a compressed state.

A bracket 30 having an upper portion bent is fixed to the upper portion of the frame 2. A lower guide 35 constituting the chute S is fixed to the inclined end surface of the bracket 30 with a bolt. Lower guide 35
Is a gutter-shaped section having a concave inner surface, and has a smooth inclined surface 35a near its upper end.

Above the lower guide 35, there is provided an upper guide 40 which forms a chute together with the lower guide. The upper guide 40 is connected to one piston rod of both rod-type cylinders 41 fixed to a fixed frame, and controls the stroke amount of the cylinder 41 constituting a vertical position adjusting device (a billet length adjusting device) L. By adjusting, the vertical position can be adjusted.

A pair of arms 5 on the rear side of the support 5
A stopper member 50 is attached to the distal end portions of the b and 5b by a shaft 45.
Is supported. The stopper member 50 is for closing the lower end opening of the chute S during forward movement to prevent the subsequent billet from falling, and has a gentle curved upper surface. A guide shaft 52 with a screw is attached to the rear end. A spring washer 53 and nuts 54, 54 are attached to an intermediate portion of the guide shaft 52, and a lower end thereof is loosely fitted into a hole 55a of a guide piece 55 provided on the support 5 and protruding laterally. The enlarged diameter part 52a for retaining is formed in the lower end part. A spring 56 for urging the stopper member 50 clockwise in FIG. 1 is interposed between the washer 53 and the guide piece 55.

Next, the operation of the material supply device 1 will be described. First, just before receiving the billet as the material, as shown in FIG. 2A, the disk 16 is in the material receiving position immediately below the chute (the cylinder 3 is retracted), and the pair of auxiliary fingers 20, 20 is closed. It has become. In this state, when the billet (material) W conveyed by the conveyer C is pushed out to the upper opening of the chute S, the material slides down through the cylindrical inside of the upper and lower guides constituting the chute, and Auxiliary finger 2
Abut on 0,20. Since the inclined surfaces that open upward are formed in the concave portions of the auxiliary fingers facing each other, the auxiliary fingers closed by the spring are pushed open by the gravity of the billet W, and the material fits between the auxiliary fingers. Then, it is placed on the disk 16. In this state, the billet is elastically held by a pair of left and right auxiliary fingers.

The impact when the billet falls is absorbed by the elasticity of the spring 18 of the shock absorbing device.
Further, since the disc 16 and the support member 17 are formed with through holes H for foreign matter discharge, the scale and the like peeled off from the billet are discharged to the outside from the through holes. On the other hand, the loader 15 is provided with a sensor (not shown) for detecting that the billet W has been fitted between the auxiliary fingers 20, 20, and this sensor detects that the billet is held. . As the sensor, for example, a photoelectric sensor can be used.

When the sensor detects that the billet W is held between the auxiliary fingers, the transfer device (reversing device) R
The air cylinder 3 extends, and the support 5 supporting the loader 15 rotates around the axis 9 within a predetermined range. By this rotation, when the held billet W reaches step 0, that is, the receiving position (0) of the forging press, the chuck Tc of the transfer device T attached to the forging line grips the billet and rises by an appropriate amount (about 15 mm). Then, it moves laterally and transfers to the first step of the forging line. Subsequently, the air cylinder 3 contracts to return the support 5 supporting the loader to the original position.

While the transfer device R transfers the billet to step 0 of the forging line, the lower end opening of the chute S composed of the guide members 35 and 40 is closed by the stopper member 50 whose upper surface is formed as a gentle curved surface. So that
Even if the subsequent billet slides down, the stopper member 50
It is supported by the upper surface of the, and does not fall below it. For this reason, there is no trouble that the subsequent billet fits in the path of the loader. Further, in FIG.
The impact caused by the sliding down is absorbed by the spring 56. After the transfer device R returns, the same operation is repeated. on the other hand,
In the forging line receiving the billet, processing in each step is performed in synchronization with the billet receiving operation.

Since the material supply device 1 elastically clamps and holds the billet with a pair of auxiliary fingers that can be opened and closed in the transfer direction, at the time of delivery, the billet is gripped by the chuck of the transfer device of the forging line and transferred. The billet can be pulled out simply by moving in the horizontal direction. Actually, the transfer device has to remove the workpiece in the subsequent forging process from the die, so that the transfer device is lifted by a necessary amount, but the rise amount is smaller than before.

[0027]

As is apparent from the above description, the material supply device of the present invention elastically clamps and holds the material with a pair of auxiliary fingers that open and close forward in the transfer direction.
At the time of delivery, the material can be extracted simply by grasping the material and pulling it forward in the feeding direction. For this reason, it is possible to reduce the lift amount of the chuck on the material receiving side, and it is possible to efficiently perform the work.
It goes without saying that this material supply device can be used as a material supply device for devices other than the forging line.

[Brief description of the drawings]

FIG. 1 is a side view illustrating an embodiment of a material supply device of the present invention.

FIGS. 2A and 2B are enlarged side views of the main part, in which FIG. 2A shows a billet receiving state, and FIG. 2B shows a state of delivery to a forging line.

FIG. 3 is a front view of the transfer device.

FIG. 4 is a plan view of an auxiliary finger support.

FIG. 5 is a side view (a), front view (b) and Y of a support.
It is an arrow view (c).

FIG. 6 is a plan view (a) and a longitudinal sectional view (b) of the loader.

FIG. 7 is a plan view (a), a side view (b), and a front view (c) of an auxiliary finger.

FIGS. 8A and 8B are a plan view and a side view showing a transfer operation of the transfer device to the chuck, wherein the left half shows a state where the work is not gripped, and the right half shows a state where the work is gripped.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Material supply apparatus 2 Frame 3 Air cylinder 5 Support 10 Receiving stand 15 Loader 16 Disk 17 Support member 20 Auxiliary finger 30 Bracket 35 Lower guide member 40 Upper guide member 41 Double rod type hydraulic cylinder C Conveyor W Material (billet) R Transfer Equipment S Chute K Shock absorber

Continuation of the front page (58) Field surveyed (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 material supply device for supplying a material to be processed to a material transfer position to a forging press from a material sliding chute provided at an end portion of a transfer device, wherein the material which has slid down is placed. A loader comprising a disk;
A transfer device for reciprocating the loader from a material receiving position to a delivery position to the forging press, wherein the loader has a pair of shafts that are pivotally supported on a rear side in a transfer direction from a position where the material is placed . Openable and closable clamp
An auxiliary finger is provided, and the auxiliary finger is in a normally closed direction.
Material that has been slid down
Then the material is pushed open by gravity and elastically
A material supply device configured to hold the material. 2. The material supply device according to claim 1, wherein the loader includes an impact buffering device that absorbs an impact caused by the material falling. 3. The material supply device according to claim 1, wherein the distance between the upper end of the auxiliary finger and the disk surface is 0.4 to 0.6 times the vertical dimension of the material. Wherein the auxiliary fingers, the pressing force provided to the loader
The material supply device according to any one of claims 1 to 3, wherein the material supply device is urged in a closing direction by a spring capable of adjusting the pressure.