JPH0683873B2 - Pellet dipping device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for immersing a billet in a dipping tank of a billet transfer system.

[Prior Art] When a billet is forged, it is usually 80
A material heated to about 0 ° C. is used, but when precision in processing dimensions is required, warm forging using a material heated at a low temperature of about 300 ° C. is used to prevent surface oxidation. In this warm forging method, before heating the billet, which is the material, with a billet heater, a coating treatment is performed in which the billet is immersed in a dipping liquid so as not to be oxidized by the heating. It is preheated to 150-200 ℃.

FIG. 6 shows an apparatus for feeding the billet to the billet heater by performing the pretreatment as described above.

Reference numeral 50 denotes a conveyer that conveys the billet 51, and the conveyed billet 51 is fed to the preheater heater 53 via the pinch roller 52. The billet 51 which has been preheated to 150 to 200 ° C. by the preheating heater 53 is put into the dipping tank 54. The billet 51 put into the dipping tank 54 is fed to the carry-in entrance of the billet heater 56 by the chain conveyor 55 partially immersed in the dipping tank 54 and carried in. The billet heater 56 heats the billet heater 56 to a predetermined temperature.

[Problems to be Solved by the Invention] However, since the billet 51 is discharged from the preheating heater 53 to the dipping tank 54 in the above-described conventional apparatus, the attitude of the billet 51 on the chain conveyor 55 is Since the billet 51 is unstable and the billet 51 is pushed up by the claws provided on the chain conveyor 55, the posture of the billet 51 becomes unstable depending on the shape of the cutting surface of the billet 51 and the billet 51 cannot be stably fed. There is. or,
Since the billet 51 is pulled up from the dipping tank 54 by the chain conveyor 55, it is difficult to adjust the immersion time of the billet 51. Furthermore, the chain conveyor 55
Since a part of the is always immersed in the dipping tank 54, it is necessary to use a corrosion resistant material for the chain conveyor 55, maintenance is difficult, and due to the operation of the chain conveyor 55,
There is a drawback that the dipping liquid drops outside the bath 54.

Therefore, the billet 51 coming out of the preheating heater 53 is gripped by a chuck, and the gripped billet 51 is immersed in the dipping tank 54 by the rotation of the arm supporting the chuck, and the billet 51 is placed in the billet heater 56 in the subsequent stage. An apparatus capable of stably feeding a plurality of billets 51 at the same time can be invented by the transportation system so as to cope with a change in the processing cycle of the preheating heater 53, but in this case, The problem is the preheater
Since the end faces of the billet 51 coming out of the 53 are in close contact with each other, even if the billet 51 is immersed in the dipping tank 54 in this state, the end face is not coated.

[Means for Solving Problems] The billet dipping device of the present invention is for dipping a billet in a dipping tank for surface treatment in the process of gripping a preheated billet with a chuck and transporting it to a billet heater. A billet dipping device, wherein a plurality of billet placing means for respectively receiving a plurality of preheated billets in close contact with each other and descending billet placing means for dipping the billet in a dipping liquid in a dipping tank And a separating means for separating the billet mounting means from each other when the plurality of billet mounting means descends.

[Operation] With the above configuration, when the billet placing means descends, or after the billet placing means descends, the separating means separates the billet placing means so as to be separated by a predetermined distance. This allows
Since the billets arranged so that the cut end faces on the billet placing means are in contact with each other are separated from each other to separate the end faces, the entire billet is coated.

[Embodiment] FIG. 1 shows a billet conveying device to which a billet dipping device according to an embodiment of the present invention is applied.

Reference numeral 1 denotes a parts feeder, which causes the billet 2 to be aligned in the column direction of the billet 2 and the cut end surfaces of the billet 2 to be in contact with each other and delivered. 3 is a chain conveyor that conveys the billet 2 fed from the parts feeder 1, 4 and 5 are lower slat conveyors and upper slat conveyors that are linearly provided with the chain conveyor 3, and both conveyors 4 And 5 are provided so as to face each other with the billet 2 being fed therebetween.

6 is the chain conveyor 3 and the lower slat conveyor 4
Is a drive motor for driving and at a predetermined speed, and 7 is
A pressing cylinder provided for pressing the slat conveyor 5 downward to press the billet 2 downward. By pressing the billet 2 against the lower slat conveyor 4, the lower slat conveyor 4 moves. The billet 2 is pushed out.
Reference numeral 8 denotes a preheat heater for preheating the billet 2 extruded at a constant speed by the lower slat conveyor 4 and the upper slat conveyor 5.

Reference numeral 9 is, for example, a sensor composed of a photodiode 9a and a photosensor 9b, and the photodiode 9a and the photodiode 9a are provided so that the billet 2 can be detected at a position further advanced by a length L from the billet discharge surface 8a of the preheating heater 8. Photosensors 9b are provided on both sides of the traveling path of the billet 2, and an optical axis 9c extending from the photodiode 9a to the photosensor 9b is separated from the billet discharge surface 8a of the preheating heater 8 by a length L in the discharge direction and is fed. It is provided so as to cross the supplied billet 2.

Reference numeral 10 denotes a swivel device provided on the right side in the feeding direction E of the billet 2 on the side of the preheater heater 8. A swivel device 10 has a vertical swivel shaft 10a that swivels 90 °. You can do it. 11 is two arms of equal length
Reference numerals 11a and 11b are L-shaped arms extending horizontally and in directions orthogonal to each other, and are provided at the upper end of the rotary shaft 10a with the bent portion of the arm 11 as a fulcrum. When one arm 11a of the arms 11 is in a position orthogonal to the feeding direction E of the billet 2, the other arm 11b is
Is parallel to the feeding direction E of the billet 2. The state of the arm 11 in such a position is A, and the arm is
11 is clockwise when viewed from above (the direction indicated by the arrow in the figure)
The state of the arm 11 which has been rotated 90 ° is set to B.

A chuck 13 that is moved up and down by an elevating cylinder 12 is provided at the end of the arm 11a, and a chuck 15 that is moved up and down by an elevating cylinder 14 is provided at the end of the arm 11b.
Each of the chucks 13 and 15 is capable of simultaneously gripping the three billets 2 as described later.

Reference numeral 16 is a dipping tank in which the dipping liquid is stored, and is provided in front of the turning device 10 with respect to the feeding direction E of the billet 2. In this dipping tank 16,
An elevating cylinder 17 and an immersion device 18 including a mounting table 18a that is moved up and down by the operation of the elevating cylinder 17 are provided.
When the mounting table 18a descends (immersion position), this mounting table 18a
The billet 2 placed on top is immersed in the dipping liquid in the dipping tank 16. Further, the billet 2 placed on the above-mentioned mounting table 18a in the raised position (standby position)
Is provided, and when the sensor 19 detects the billet 2, the cylinder 17 is operated for a certain period of time,
The dipping device 18 descends for a certain period of time. This allows the dipping device
The billet 2 placed on the placing table 18a of 18 is the dipping tank 1
It is soaked in the dipping liquid in 6 for the above-mentioned fixed time, and this immersion time can be arbitrarily adjusted within the transfer cycle time of the arm 11.

With such a configuration, when the arm 11 is in the position of the state A as described above, by lowering the chuck 13, the three billets 2 discharged from the preheating heater 8 to a predetermined position can be gripped. In addition, by lowering the chuck 15, the mounting table 18a of the dipping device 18 can be
The upper three billets 2'can be gripped.

Reference numeral 20 denotes a chain conveyor which is positioned on the side of the swivel device 10 so as to face the preheater heater 8 and can be fed in a direction F opposite to the billet feeding direction E, Further, the chain conveyor 20 is provided at such a position that the billet 2 held by the chuck 15 of the arm 11b is placed on the chain conveyor 20 when the arm 11 is rotated to the position B. To be Further, since the arm 11a and the arm 11b have the same length and are orthogonal to each other, when the arm 11 is in the state B position, the arm 11
The chuck 13 of a comes to rest on the dipping device 18.
When the arm 11 is in the position of state B, the gripping portions of the chucks 13 and 15 perform an operation of releasing the billet 2 which is being gripped together.

Reference numerals 21 and 22 denote a lower slat conveyor and an upper slat conveyor, which are linearly provided with the chain conveyor 20. The conveyors 21 and 22 are provided so as to face each other with the billet 2 being fed therebetween. . Reference numeral 23 is a drive motor for driving the chain conveyor 20 and the lower slat conveyor 21 at a predetermined speed, and 24 is provided for pressing the upper slat conveyor 22 downward to press the billet 2 downward. The pressing cylinder is a pressing cylinder, and by pressing the billet 2 against the lower slat conveyor 21, the billet 2 is pushed out as the lower slat conveyor 21 moves.

25 is a billet heater that heats the billet 2 extruded by the lower slat conveyor 21 and the upper slat conveyor 22 at a constant speed to a predetermined forging temperature, and 26 is a billet heater that is heated by the billet heater 25 at a predetermined location. A shooter to send to.

27 is an air blower for discharging the smoke generated by the combustion of the dipping liquid in the billet heater 25,
The generated smoke is exhausted to the outside by the air exhauster 27 through the hood 28 and the exhaust pipe 29 provided at the billet inlet of the billet heater 25.

FIG. 2 is an enlarged view of a chucking device showing the chucks 13 and 15 and a chuck driving unit, and FIG. 3 is a side view of FIG.

The chuck part is composed of a fixed claw 30 and a movable claw 31, each of which has a plurality of claws. The chucking cylinder 32 opens the movable claw 31 so that three billets 2 closely aligned in the axial direction can be simultaneously gripped. It has become. Further, spring pressure is applied by the leaf spring 33 so that the movable claw 31 opened for gripping the billet 2 returns to the original closed state.
As a result, even if there are billets with different billet diameters,
Since a predetermined gripping force is applied to each billet 2, the billet 2 can be securely gripped.

FIG. 4 and FIG. 5 are a front view and a top view showing the details of the immersion device 18 part.

The billet mounting table 18a that is moved up and down by the dipping device 18 is 18a.
It is divided into _three , _{1 to} 18a ₃ . And each mounting table 1
8a _{1 to} 18a ₃ are horizontal portions X of the arms that constitute the dipping device 18.
The fitted slidably and each table 18a ₁ ~18a _3, the guide pin P _1, P _2, P ₃ are provided in a horizontal direction perpendicular to the horizontal portion X of the arm. And the dipping tank 16
The interior sidewall, said guide pins P _1, P _2, have guide rails G ₁ to be fitted to each tip of the P _3, G _2, G ₃ is provided, the guide pin P ₂ and mating central the guide rail G ₂ is but provided vertically, the guide pins P ₁ and the guide rails G ₁ to be fitted is provided in an oblique direction so as to expand the distance between the guide rails G ₂ at the bottom, while the guide pin P _The guide rail G ₃ that fits with the ₃ is provided in an oblique direction so that the space between the guide rail G ₃ and the guide rail G ₂ widens.

As a result, when the lifting cylinder 17 operates and the dipping device 18 rises, as shown in FIG. 4, each of the mounting tables 18a _{1 to} 18a ₃
Is in a state of being in close contact with each other on the dipping liquid surface, but when the dipping device 18 descends, each of the mounting tables 18a _{1 to} 18a ₃ descends along the guide rails G ₁ , G ₂ , and G ₃ , Below the surface of the dipping liquid, the mounting tables 18a _{1 to} 18a ₃ are separated from each other with a space therebetween.

Next, the operation of the apparatus having the above configuration will be described.

It is assumed that the arm 11a is located at the position A in which the preheating heater 8 is located on the discharge port side, and that the same operation as that described later has already been performed, and the mounting table of the dipping device 18 is
It is assumed that three billets 2'are placed on 18a in an aligned state.

The billet 2 fed from the parts feeder 1 passes through the chain conveyor 3 to the lower and upper slat conveyors 4,
It is pushed out toward the preheater heater 8 at a constant speed by the 5. The cutting front surface of the billet 2 which has been preheated to 150 to 200 ° C. by the preheat heater 8 and is discharged is the discharge surface 8a of the preheat heater 8.
The sensor 9 detects the billet 2 when it reaches a position further separated by L from. This allows the arm 11
The cylinder 12 of a operates and the chuck 13 descends to grip three billets 2 at the same time.

On the other hand, the siririnda 14 of the arm 11b is activated and the chuck 15
Descends and grips three billets 2'which have been immersed in the dipping liquid for a predetermined time in the previous operation and placed on the mounting table 18a.

Next, with the cylinders 12 and 14 and chucks 13 and 15 being held, by the operation of the revolving device 10, the arm 11 is rotated 90 ° clockwise in the drawing and the arm 11a is on the dipping tank 16. Arm 11b is located on chain conveyor 20 B
It becomes the state of. In this state, the billet 2 gripped by the chuck 13 is located on the dipping device 18, and the billet 2 ′ gripped by the chuck 15 is the chain conveyor.
Will be located above 20.

Then, the cylinder 12 of the arm 11a operates and the chuck 13
Is lowered and released at a predetermined position, and the cylinders 12 are operated after the three billets 2 that have been gripped are placed on the respective mounting bases 18a _{1 to} 18a ₃ of the mounting bases 18a of the dipping device 18 in an aligned state. Then, the chuck 13 rises. At this time, the cylinder 14 of the arm 11b is operated and the chuck 15 is lowered and released, and the three billets 2'which are gripped are placed on the chain conveyor 20 in an aligned state.

Then, the operation of the cylinder 14 raises the chuck 15.
After that, the revolving device 10 operates again, and the arm 11 turns 90 ° in the opposite direction this time, and returns to the state A to be in the standby state. The dipping device 18 descends for a predetermined time. At this time, as described above, In conjunction to the lowering of the immersion device 18, for separating at a respective each table 18a ₁ ~18a ₃ billet intervals, each billet of the mounting table 18a ₁ ~18a ₃ 2 The end faces of the billet 2'which have also been separated and adhered to each other are separated, and the entire surface of the billet 2'is coated with the dipping liquid. Thereafter, After completion coating process for a predetermined time, but dipping device 18 is raised again, table 18a ₁ ~18a ₃ mounting also the this time
Rises along the guide rails G ₁ , G ₂ and G ₃ , so that the respective end faces of the billet 2 ′ on each mounting table are in the original state in which they are in close contact with each other.

Then, when the billet 2 discharged from the preheater 8 is detected by the sensor 9, the billet 2 is sequentially dipped in the dipping solution by the arm 11a for a predetermined time, and the billet 2 dipped in the dipping solution by the arm 11b.
Are sequentially conveyed on the chain conveyor 20. The billet 2 placed on the chain conveyor 20 is moved to the billet heater 25 at a predetermined speed by the lower and upper slat conveyors 21 and 22.
Be sent to. The billet 2 heated to a predetermined temperature by the billet heater 25 is fed via a shooter 26 to a warm forging machine (not shown).

As described above, the apparatus for transferring the billet 2 heated by the preheater 8 to the dipping tank 16 and the apparatus for transferring the billet 2 soaked in the dipping liquid in the dipping tank 16 to the chain conveyor 20 in the subsequent stage have a right angle as described above. Using the arm 11 extending in two directions, the billet 2 heated by the preheater 8 and the billet 2 on the dipping device 18 in the dipping tank 16 are simultaneously gripped by the chucks 13 and 15 at the arm position in a certain state A, respectively. In addition, the billets 2 held by the chucks 13 and 15 at the arm position in another state B are placed on the dipping device 18 and the chain conveyor 20, respectively. The cylinders of the billet 2 on the mounting table 17a and the chain conveyor 20 are placed in fixed directions such as 90 ° and 180 ° with respect to the billet feeding direction E, respectively. It is done, it is possible to convey to the dipping tank 18 and the chain conveyor 20 with the billet 2 in a reliable operation in the operation of the arm 11.

At this time, the chucks 13 and 15 are configured to simultaneously hold three billets 2 at a time, so that the operations of the swivel device 10 and the dipping device 18 for transporting the billets 2 become slow,
Therefore, not only the accurate gripping operation and the dipping operation of the billet 2 are possible, but also the supply speed of the billet 2 sequentially discharged from the preheating heater 8 can be easily followed.

Furthermore, the billet mounting table 18a in the dipping device 18 is mounted on each of the mounting tables 18a ₁ to 18a in a state of being immersed in the dipping liquid.
Since 18a ₃ is separated at a predetermined interval, the placed billets 2'are also separated from each other, and the entire surface is coated with the dipping liquid.

Further, by providing the air blower 27 for forcibly discharging smoke in the billet carry-in part of the billet heater 25, adhesion of the conductive substance to the heating coil and the refractory of the billet heater 25 is reduced and heating by the heating coil is reduced. At the same time, smoke is emitted to the outside, so that the environment of the workplace is less polluted.

Further, according to this system, since the arm 11 swings, the column direction of the billet 2 on the chain conveyor 20 for feeding the billet 2 to the billet heater 25 is parallel to the billet feeding direction E. Chain conveyor 20
Since the feeding direction F of the billet 2 by means of can be made the opposite direction to the feeding direction E of the chain conveyor 3 for feeding the billet 2 to the preheater 8, the whole apparatus can be made into a U-shape. The installation space can be reduced.

Also, by raising and lowering the dipping device 18,
Since the billet on the mounting table 18a is soaked in the dipping liquid, the dipping time can be set accurately, and the dipping device 18 simply moves up and down. Draining can be performed above, and there is no fear that the dipping liquid will drip outside the dipping tank 16 as in the conventional device.

Further, since the dipping device 18 itself has a simple structure, it is not difficult to construct the dipping liquid from a material having corrosion resistance to the dipping liquid, and the dipping device 18 is located outside the dipping liquid except when the billet 2 is dipped. Therefore, the corrosion of the dipping device 18 can be reduced.

Then, instead of using a pinch roller as in the past, a device for sending the billet to the preheat heater 8 and the billet heater 25,
There is no risk of damaging the surface of the billet 2 by using the caterpillar-shaped slat conveyor.

[Advantage of the Invention] According to the present invention, the billet mounting table for dipping the billet is separated from each other under the dipping solution, so that the entire surface of the billet is immersed in the dipping solution. It enables even coating on the entire surface.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a billet conveying device to which a billet chucking device of the present invention is applied, and FIG.
FIGS. 3 and 4 are front and side views of the chucking device in FIG. 1, FIGS. 4 and 5 are side sectional views and top views of the dipping device in FIG. 1, and FIG. It is a front view of the billet conveying device. 1 ... Parts feeder, 2 ... Billet, 3,20 ... Chain conveyor, 4,21 ... Lower slat conveyor, 5,22 ...
… Upper slat conveyor, 6,23 …… Drive motor, 7,24…
... Pressing cylinder, 8 ... Preheater, 9,19 ... Sensor, 10 ... Swivel device, 10a ... Rotating shaft, 11 ... Arm, 1
2,14,18 …… Lifting cylinder, 13,15 …… Chuck, 16 ……
Dipping bath, 17 ...... lifting cylinder, 18 ...... immersion apparatus, 18a ₁ ~18a ₃ ...... _{table, P 1, P 2, P} 3 ...... guide pins,
G ₁ , G ₂ , G ₃ …… Guide rail, 25 …… Billet heater, 26
…… Shooter, 27 …… Blower, 28 …… Hood, 29 ……
Discharge pipe.

Claims (1)

[Claims] 1. A chuck (1) for a preheated billet (2).
Billet immersing device (18) for immersing the billet (2) in a dipping tank (16) for surface treatment in the process of gripping the billet (3, 15) and transporting it to the billet heater (25). A plurality of billet mounting means (18a) for respectively receiving a plurality of preheated billets (2) in a close contact state, and a billet mounting means for immersing the billet (2) in the dipping liquid in the dipping tank (16). When the lowering means (17) for lowering the placing means (18a) and the plurality of billet placing means (18a) are lowered, the separating means (G ₁ , G ₂ ) for separating the billet placing means (18a) from each other. , G ₃ , P ₁ , P
₂ , P ₃ ), and a billet dipping device.