JP3377741B2 - Finger device of forging press machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a finger device for removing products and burrs in a forging press equipped with a transfer feed device.

[0002]

2. Description of the Related Art A forging press A with a transfer feed device is shown, for example, in Japanese Utility Model Publication No. 6-14916 (publication 1) and Japanese Patent Publication No. 62-27895 (publication 2). Referring to FIG. 4, the required number of upper and lower molds P ₁ ... P ₅ , Q ₁ ... Q ₅ are provided, and the workpiece a is sandwiched by the fingers b of the beam F that moves up and down, left and right, and front and back of the transfer feed device B. By repeating the peeling operation and the releasing operation, the workpiece a is moved to the respective molds P ₁ , Q _1, ... P ₅ , Q.
Move to ₅ in sequence and press work.

In this forging press working, in hot forging, an infinite pressurizing force is generated at the bottom dead center of the press. Therefore, the influence of the pressurizing force on the forging press main body is reduced, and In order to protect the main body and the mold, an outer burr is generally formed on the outer peripheral portion of the product and an inner burr is formed on the inner peripheral portion. Regarding the inner burr, it can be easily discharged to the outside of the machine through the chute from the center hole of the lower mold (see the example below), but the outer burr is not easy to discharge, and it is By the finger b, etc.,
Outside of that, burrs are discharged and products are discharged (taken out).

In the finger device, as shown in the above publications, the beam F is provided with an outer burr take-out claw and a product take-out claw, and both the claws hold or receive the product or the outer burr, and the outside of the machine. It is transported to and discharged by ejecting both claws.

That is, in the technique of Publication 1, in the final press working P ₅ , the product is placed on the lower die and
The outer burr rises at the same time as the upper die (punch) and fingers b
After the burr receiving plate (outer burr take-out claw) and the product take-out claw are located between the lower mold and the upper mold, peel the outer burr from the upper mold with a stripper plate (knockout) and drop it. Receive the product with the receiving plate and sandwich the product with the product take-out claw. The product is conveyed in this state, and while it is being conveyed, it is sent to the discharge chute by scraping the outer burr with a scraper and discharged to the outside of the machine. At the end of the conveyance (the lateral movement stroke of the beam F: the end of the return / advance stroke), the product is taken out. Open the claw and feed the product into the chute.

According to the technique of Publication 2, in the final press working P ₅ , the product placed on the lower die is clamped by the product take-out pawl, and the outer burr on the lower die below is further taken out by the outer burr take-out pawl. Scoop and transport in that state. Near the end of the transport, both pawls are rotated to feed the product and the outer burr to separate chutes.

[0007]

In the technique described in the above publication 1, the left and right moving strokes of the beam F are required to be long in order to discharge the outer burr on the way and take out the product. If the stroke of the left-right movement becomes long, each mold P
₁ ... width of the P _5, Q ₁ ... Q ₅ of the interval also widened by forging press machine A becomes longer. An increase in the lateral width is not economical because the forging press A must be upsized in order to ensure rigidity that can withstand the pressing pressure.

Further, in order to drop the outer burr by the stripper plate and receive the outer burr by the burr receiving plate, it is necessary to drop the outer burr accurately downward on the feed center line.
This is because, in order to scoop the outer burr and discharge it to the chute by its own weight drop by the scraper with a constant movement, the outer burr does not fall well on the chute unless it is at the required position.

In the technique described in the above publication 2, the outer burr is picked up by the outer burr take-out claw, but at that time, the sizes of the outer burr are not uniform, and the difference in contact resistance between the outer burr take-out claw surface and the outer burr. As a result, the outer burr is not always placed at the required position of the outer burr removal claw, and on the contrary, it often deviates significantly from the required position. If there is a large deviation, the outer burr may not drop even if the outer burr ejecting claw is opened, or may not drop on the discharge chute even if it falls. If the outer burr does not fall or does not fall on the discharge chute, it will cause an operation stop.

Further, in order to prevent the deviation of the outer burr on the outer burr take-out claw, a pad is attached to a position on the outer burr take-out claw corresponding to the size of each outer burr, and the required size is obtained with this bar. Positioning of the outer burr is also done. But,
The size of the work piece (billet) a varies from the beginning, the size of the outer burr varies due to differences in heating temperature, etc., and the familiarity and change in mold lubrication performance when shifting from the initial operating state to continuous operation Due to such factors, the size of the outer burr often changes. If the outer burr becomes larger than required, the outer burr will be deformed by the baffle because the position of the baffle is fixed. The deformation is generally bent and becomes uneven due to the uneven outer burr shape, which leads to deterioration of transport efficiency during scrap processing.

Under the above circumstances, it is an object of the present invention to accurately pinch an outer burr so that it can be discharged to a required position.

[0012]

In order to achieve the above object, the present invention provides a finger device for a forging press as described above, wherein a product and an outer burr are taken out from a die by a take-out claw, respectively. The finger to be taken out has a product take-out claw that picks up the product by pinching it, and an outer burr take-out claw that picks up and picks up the outer burr, and this outer burr take-out claw advances and retracts in the holding direction according to the size of the outer burr. It was possible.

As described above, since the outer burr is sandwiched by the take-out claws, the taking-out is stable, and the outer burr take-out claws can be moved back and forth in the holding direction. Therefore, the outer burr can be clamped smoothly, and the center of the outer burr is also prevented from being greatly displaced. Therefore, the outer burr can be discharged accurately.

At this time, if the outer deburring claw can be elastically moved back and forth in the holding direction, the outer deburring claw can be freely moved back and forth according to the size of the outer burr to simplify the structure and remove the outer burr. Can be pinched accurately.

Further, according to the present invention, since the outer deburring claw can be moved back and forth in the holding direction, even if the finger is opened to release (fall) the product, the outer deburring claw is opened according to the opening. Focusing on the fact that the outer burr can continue to be clamped if it is advanced, the outer burr ejecting claw and the product ejecting claw simultaneously clamp the outer burr and the product, and first, open the product ejecting claw to drop the product and take it out. At the same time, in response to the opening of the product take-out pawl, the outer burr take-out claw is advanced to maintain the outer burr clamping state, and after the product has dropped, the outer burr take-out claw is further opened to drop the outer burr. I took it out.

With this configuration, as described in the above-mentioned publications 1 and 2, when the product and the outer burr are simultaneously lifted from the mold, the outer burr is knocked out and ejected, or the ejection claw is rotated and ejected. There is no need to do it, and the operation is simple and smooth. At this time, as described above, if the outer burr take-out claws having elasticity are capable of being clamped, the process corresponding to the opening of the product take-out claws is automatically performed, and the center deviation is also accurately clamped. Since they are discharged, the individual discharges are surely separated.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a specific mode of the outer burr take-out pawl, the outer burr take-out pawl is attached to the product take-out pawl so as to be movable in the clamping direction, and the elastic force is applied by a spring. The configuration may be adopted.

Further, an outer burr receiving claw can be provided on the lower side of the product take-out claw, and by doing so,
Since the outer burr receiving claws prevent the outer burr from falling down, the outer burr take-out claws stably hold the outer burr.

Further, the outer burr take-out pawl may be provided with a switch for detecting the advance / retreat of the outer burr take-out pawl to detect whether the outer burr take-out pawl is clamped by the outer burr take-out pawl. In this way, when the product and the outer burr are taken out by the separate operations of the fingers (see the embodiment), the sandwiching of the outer burr can be detected independently.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic partially cut plan view of one embodiment, and FIG.
5 is a schematic partially cut front view of the same embodiment, FIG. 3 is a perspective view of a finger portion, FIG. 4 is the same cut front view and a plan view of a main portion of cutting, and FIG.
6 and 7 are enlarged views for explaining the operation, FIGS. 7 to 10 are explanatory views of the forging operation of the same embodiment, and FIGS. 11 to 14 are illustrations of the operation of the other embodiments.

Transfer feed device B of this embodiment
As described above, the attached forging press machine A is provided with the five upper and lower molds P _{1 to} P ₅ and Q _{1 to} Q ₅ , and the finger b of the beam F which moves up and down, left and right, and front and back of the transfer feed device B.
By repeating the operation of picking up the work piece (billet) a and the operation of separating the work piece a, the work piece a is moved to each mold P ₁ , Q _1, ...
And one after the other to shift between P _5, Q _5, the pressing.
Hereinafter, the lower positions of the upper molds P _{1 to} P ₅ are designated as pressing (process) positions and are indicated by P _{1 to} P ₅ .

In such a forging press A, the present invention is characterized by a portion forming a finger b for taking out the product / outer burr from the pressing position P ₅ , as shown in FIGS.
As shown in FIG. 2, the beam F is provided with a finger receiving metal fitting 1, and the upper metal fitting 2 and the lower material fitting nail 3 are bolted to the metal fitting 1. One of the upper and lower claws 2 and 3 may be omitted. A groove 4a is formed rearward from the center of the tip of the upper product take-out pawl 2, and the outer burr take-out pawl 4 is movably fitted in the groove 4a to move back and forth.

The product take-out upper claw 2 is provided with a cylinder 5 having a built-in spring 5a. The outer burr take-out claw 4 is fixed to a retractable rod 6 of the cylinder 5. One end of the spring 5a is supported by a receiver 8 that moves forward and backward by the adjusting screw 7, and the piston is always positioned at the front end of the cylinder 5 (in the state of a chain line).
Depending on the position of, the elastic force of the outer burr removal claw 4 in the advancing and retracting direction is set.

As shown in FIG. 4, the finger receiving metal fitting 1 has its supporting shaft 31 inserted into the beam F, so that the case 3
It is supported by the support cylinder 33 via 2 so as to be movable back and forth only. A spring 34 is interposed between the case 32 and the support shaft 31, and the support shaft 31, that is, each of the claws 2, 3, and 4 is biased rightward in FIG. 4 by the spring 34. The fitting position of the support cylinder 33 and the case 32 is adjusted by the push screw 35 and the pull screw 36. In the figure, 31a is a spline shaft, which slides on the spline portion 32a of the case 32 to form a guide for the support shaft 31.

An operating piece 37 is fixed to the rear end of the support shaft 31 of the finger receiving bracket 1 with a nut 38.
The proximity switch 39 provided on the case 32 faces the case 7. The facing distance is adjusted by the screwing amount of the screw 39a, the proximity switch 39 is turned on or off at the required perspective position of the operating piece 37, and the take-out pawls 2, 3, 4 remove the product a ₅ or the outer burr a '. When the work piece 37 is clamped (contacted) and retracted, it is turned off or on due to the retraction of the operating piece 37 by a certain length, and the clamping of the product a ₅ or the outer burr a ′ is detected. That is, even if the beam F performs the sandwiching action of the billet a ₁ ... And the outer burr a ′, if the sandwiching is missed, the switch 39 does not operate and the miss can be detected.

The other finger b (P in FIG. 1)
_The fingers b) corresponding to _{0 to} P ₄ have the same configuration as the conventional one, that is, the configuration in which the mechanism for sandwiching the outer burr a ′ such as the outer burr ejecting claw 4 is excluded in FIGS.

In the transfer feed device B having the finger device having such a structure, the billet a from the induction heater is sent to the front position P ₀ of the forging press A corresponding to the pressing operation by the billet supplying device (not shown). , The billet a is transferred by the transfer feed device B via the fingers b to the press positions P _{1 to} P _1.
5 are sequentially sent to be product a ₅ . That is, as shown in FIG. 9, the billet a at the front position P ₀ is subjected to bushing at the first press position P ₁ , rough finishing at the second press position P ₂ , and forming at the third press position P ₃ . Precision finishing is performed at the fourth press position P ₄ , and outer burr a ′ or inner burr a ″ is punched at the fifth press position P ₅ .

At this time, a product a ₅ and an outer burr a ′, which will be described later,
In order to alternately discharge the inner burrs a ″, the billet a is sent to the front position P ₀ every two pressing operations as shown in FIGS. 10 (a) to 10 (f). a)
Then, the billet a is fed to the front position P ₀ , and the second and fourth pressed products a ₂ and a ₄ are separated from the molds Q ₂ and Q ₄ by the push-up rod e, and the billet a in that state is Then, the processed products a ₂ and a ₄ are held by the finger b, and the process proceeds to the next pressing step as shown in FIG. If it shifts, as shown in FIG. 7C, after press working, as shown in FIG. 7D, the processed products a ₁ , a ₃ , a ₅ are moved to the mold Q ₁ by the push-up rod e. It is separated from the Q _3, Q _5. At this time, the mold Q ₅ of the fifth step P _5, as shown in FIG. 5, the inner mold q ₁ pushes up the final workpiece a ₅ That product a ₅ rises.

The processed products a ₁ , a ₃ , a in this thrust state
₅ is held by the finger b as shown in FIG.
As shown in (e), the billet a is sent to the front position P ₀ while being transferred to the next pressing step and the product discharging step described later. If the processed products a ₁ and a ₃ move, the same figure (f)
After the press working as described above, the respective processed products a ₂ and a ₄ are separated from the molds Q ₂ and Q ₄ as shown in FIG. At this time, as shown in FIG. 6, the mold Q ₅ of the fifth step P _5, pushes up the outer burr a 'outer mold q ₂ rises. The workpieces a ₂ and a ₄ and the billet a in the pushed-up state are sandwiched by the ejection claws 2 and 3, and the outer burr a ′ is clamped by the ejection claw 4, so that the next pressing step and the burr ejection step described later are performed. Then, the first press position P _{1 is} entered. The above operation is repeated and the forging press working is continuously performed.

[0030] The outer burr a 'and inner burr a "is punched in either of the press working twice, that is, punching alternately, the inner burrs a" center hole q of the mold Q ₅
Through to a discharge chute 22 described later. In addition, a slit c into which the claws 2 and 3 can be inserted is formed on the upper surface of the outer mold q ₂ , and the lower claw 3 has an outer burr a ′ as shown in FIG. 6C.
Can enter smoothly below. Therefore, when the outer burr a'is held by the take-out claw 4, the lower claw 3 serves as a receiving claw for the outer burr a '.

Next, the discharge structure of the product a ₅ and the burrs a ′ and a ″ will be described with reference to FIGS. 2, 7, and 8, and next to the mold Q ₅ of the fifth pressing step P ₅ , Product a
_5, a discharge chute 10 for discharging, a discharge chute 21 for the outer burr a ′, and a discharge chute 22 for the inner burr a ″ are vertically stacked, and the inner burr discharge chute 22 is located at the center of the mold Q ₅ . Inner burr a "punched out by being connected to hole q
There slide down through the holes q, transferred to a belt conveyor C _3.

An L-shaped first drive link 11 is provided at the upper end of the outer burr discharge chute 21 so as to be swingable in the middle thereof, and the air cylinder 14 is provided at one end of the link 11.
The first link 12 is connected to the other end, and the second link 12
To the other end of the third link 13 which is swingable near the mold Q _5.
Are connected. Therefore, as the rod of the air cylinder 14 expands and contracts, as shown in FIG. 7 and FIG.
Two modes of 1, 12, and 13 are performed. Air cylinder 14
Instead of this, a hydraulic cylinder, a ball screw mechanism driven by a servo motor, or the like may be adopted.

A burr discharge plate 15 is integrally fixed to the first link 11, and when the rod of the air cylinder 14 is extended,
As shown in FIG. 8, the discharge plate 15 is located below the carrying-out position (horizontal position) D of the finger b, and
When is opened, the outer burr a ′ separated from the lower claw 3 or the outer burr removal claw 4 is received and guided to the discharge chute 21. The outer burr a ′ that has slid on the discharge chute 21 reaches the position on the conveyor C ₁ . On the lower surface of the discharge plate 15, the first
A plate (tilt plate) 16 extending toward the swing axis (rotation axis) of the link 11 is provided.
A phenomenon in which the product a ₅ described later hits its swinging shaft portion or the like and is prevented is prevented.

At the swing point of the third link 13, the link 13
When the rod of the air cylinder 14 is contracted, the product mounting plate 17 is integrated with the product mounting plate 17, and the mounting plate 17 is positioned horizontally at the carry-out position D of the finger b as shown in FIG. The product a ₅ sandwiched by b is placed without dropping. In this state, when the rod of the air cylinder 14 is extended, as shown in FIG. 8, the mounting plate 17 is inclined to swing downwardly, the product a ₅ the mounting plate 17 as its swing,
The chute 10 slides on the belt conveyor C ₂ and is sent to a required position. In this way, the product a ₅ slides on the conveyor C ₂ without dropping in the space,
The risk of dent scratches is extremely low.

The rod contraction of the air cylinder 14 is carried out during the operation shown in FIG. 10D, and the rod extension is carried out during the operation shown in FIG. 10F. When the rod contracts, the discharge plate 15 rises as shown in FIG. 7, so that the outer burr a ′ on the discharge plate 15 is reliably delivered onto the discharge chute 21.

In the above-described embodiment, the product a ₅ and the outer burr a'are alternately discharged every time the beam F is moved back and forth. However, since the outer burr take-out claw 4 can move forward and backward in the clamping direction, the beam F opening operation is performed. It is also possible to drop (discharge) the product a ₅ first, and then drop the outer burr a ′.

That is, in the mold Q ₅ of the fifth step P ₅ ,
The outer burr a'is processed by punching the product a ₅ .
After that, as shown in FIG. 11A, the outer mold q ₂ is raised so that the outer burr a ′ is on the upper side and the product a ₅ is on the lower side, and in that state, the beam F (finger b) Is closed ((b) in the figure), the product a ₅ is clamped by the take-out pawls 2 and 3, and the outer burr a ′ is held by the take-out pawl 4, and in that state, the product is lifted and the discharge process is started. ((C) of the same figure).

At the time of this transition (when the beam F is advanced),
First, as shown in FIG. 11D, the fingers b (the take-out claws 2 and 3) are opened to the extent that the product a ₅ drops, and the product a ₅ is discharged. At this time, the outer burr take-out claw 4 continues to hold the outer burr a ′ by the progress of the elastic force of the spring 5a. Therefore, after the product a ₅ is discharged, the finger b (claw 4) is further opened to discharge the outer burr a ′ as shown in FIG. When discharging the product a ₅ and the outer burr a ′ at the same position, the discharge chutes of the product a ₅ and the outer burr a ′ are alternately positioned at the discharging position. When discharging at different positions, each discharging chute is provided at the corresponding position, and the product a ₅ or the outer burr a ′ is provided on both discharging chutes.
Make sure that the cover that does not enter is covered during other discharges. The cover may be omitted.

In the above embodiment, the finger receiving bracket 1
Since the forward / backward movement of the finger b is detected by the proximity switch 39, the presence or absence of the pinching state of the finger b is detected.
The presence or absence of the pinch of ₅ can be reliably detected. However, since the extraction claw 4 of the outer burr a ″ is retracted by the spring 5a, the finger receiving metal fitting 1 is not retracted or even if it is retracted a little.
It is difficult to accurately detect whether or not the outer burr a ′ is pinched. Therefore, as shown in FIG. 12, an operating scale 41 extending from the rear end of the piston rod 6 to the inside of the beam F is provided, the operating scale 41 is provided with an operating piece 42, and the beam F is provided with a proximity switch 43. It is advisable to detect the sandwiching of the outer burr a ′ independently by contacting or separating the switch 42 with the switch 43. That is, like the proximity switch 39 and the operating piece 37 described above,
The opposing distance is determined by a stopper provided on the cylinder 5 or the beam F, and the backward movement of the take-out pawl 4 is detected by the switch 43.

As for the elastic forward / backward movement of the outer burr take-out claw 4, as shown in FIG. 13 (a), compressed air may be enclosed in the cylinder 5 to obtain elastic force by the compression. The elasticity is adjusted by the air pressure by the accumulator 51. Further, when the advancing / retreating of the take-out pawl 4 is controlled by hydraulic pressure or air pressure, the configurations of FIGS. In the figure, t
Is a hydraulic or pneumatic supply / discharge port.

Further, the shape of the outer deburring claw 4 may be an arc shape (FIG. 14A, a hook shape (FIG. 14B)) as shown in FIG. There is an advantage that the center of the outer burr a'is provided by the bilateral slopes that are symmetrical with respect to the center.

Further, the outer burr take-out claw 4 is the product take-out claw 2
May move above it without penetrating it. Further, the cylinder 5 and the like can be attached to the beam F.

[0043]

As described above, according to the present invention, since the outer burr is clamped and discharged by the forward and backward claws, the outer burr can be smoothly clamped and accurately discharged.

Also, when the product and the outer burr are simultaneously sandwiched and discharged separately, the action can be smoothly performed by advancing and retreating the outer burr removal claw.

[Brief description of drawings]

FIG. 1 is a schematic partial plan view of an embodiment.

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

FIG. 3 is a perspective view of a finger portion of the embodiment.

FIG. 4 (a) is a cutaway front view of the finger portion, and FIG. 4 (b) is a plan view of the cut essential portion.

5A and 5B are explanatory views of the operation of the embodiment, in which FIG. 5A is a plan view and FIG.

6A and 6B are explanatory views of the operation of the embodiment, in which FIG. 6A is a plan view, FIG. 6B is a cutaway front view, and FIG.

FIG. 7 is an explanatory diagram of the discharge action of the same embodiment.

FIG. 8 is an explanatory diagram of the discharge action of the same embodiment.

FIG. 9 is an explanatory view of a forging operation of the same embodiment.

FIG. 10 is an explanatory view of the forging operation of the same embodiment.

FIG. 11 is an explanatory drawing of the discharging action of another embodiment.

FIG. 12A is a perspective view of a finger portion of another embodiment,
(B) is a cutaway front view

FIG. 13 is a cutaway front view of a main part of each of the other embodiments.

FIG. 14 is a perspective view of a main part of each of other embodiments.

[Explanation of symbols]

A Forging press B Transfer feed device C ₁ , C ₂ , C ₃ Belt conveyor F Beam P _{1 to} P ₅ Upper mold (press position) Q _{1 to} Q ₅ Lower mold a Billet a _{1 to} a ₄ Processed product a ₅ Product a'Outer burr a "Inner burr b Finger e Push bar q Inner burr hole q ₁ Inner mold q ₂ Outer mold 1 Finger receiving bracket 2 Product take-out top claw 3 Outer burr catching claw (Product take-out bottom) Claw) 4 Outer burr removal claw 5a Spring 10 Product removal chute 11, 12, 13 Link 14 Air cylinder 15 Burr discharge plate 16 Inclined plate 17 Product placement plate 21, 22 Burr discharge chute 37, 42 Clamping detection operating piece 39, 43 Detection switch

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Claims (6)

(57) [Claims] 1. A plurality of dies P ₁ , Q ₁ to be pressed.
The product a ₅ and the outer burr a ′ in the forging press machine A with a transfer feed device B for sequentially feeding and forging the material a between the fingers b by moving it up and down, left and right and forward and backward.
A finger device for taking out the product a ₅ and the finger b for taking out the outer burr a ′ are:
Together with the product take-out claw 2 to take out by holding the product a _5, has an outer burr removal claw 4 to take out by sandwiching the outer burr a ', the outer burr removal claw 4, with respect to said product take-out pawl 2 A finger device for a forging press machine, which is capable of advancing and retracting in a clamping direction according to the size of the outer burr a '. 2. The outer burr take-out claw 4 can be moved forward and backward in the holding direction with elasticity, and can be moved forward and backward freely according to the size of the outer burr a ′. Finger device for forging press. 3. The outer burr take-out claw 4 is attached to the product take-out claw 2 so as to be movable in the holding direction, and the elasticity is imparted by a spring 5a. Forging press machine finger device. 4. The finger device for a forging press according to claim 1, wherein an outer burr receiving claw 3 is provided below the outer burr take-out claw 4. 5. The outer burr take-out pawl 4 is provided with a switch 43 for detecting the advance / retreat of the outer burr take-out claw 4, and the presence or absence of the outer burr a'clamped by the outer burr take-out claw 4 is detected by the switch 43. The finger device of the forging press machine according to any one of claims 1 to 4. 6. The finger device for a forging press according to any one of claims 1 to 5, wherein an outer burr a ′ and a product a ₅ are simultaneously formed by the outer burr takeout claw 4 and the product takeout claw 2. First, the product take-out claw 2 is opened and the product a ₅ is dropped and taken out, and the outer burr take-out claw 4 is advanced corresponding to the opening of the product take-out claw 2 to hold the outer burr a ′. The finger device of the forging press machine characterized in that after the product a ₅ is dropped, the outer burr take-out claw 4 is further opened to drop the outer burr a ′ and take it out.