JPH0510176B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a conveying device for feeding billets to a billet heater.

[Prior art and its problems] For example, when forging a billet, the general forging method uses material that has been preheated to about 800°C, but if precision is required for the machined dimensions, it is necessary to prevent surface oxidation. Warm forging, which uses materials heated at low temperatures of around 300°C, is used to achieve this. In this warm forging method, before the billet material is heated with a billet heater, it is coated with dipping liquid to prevent it from oxidizing due to heating. Must be preheated to ~200℃.

FIG. 2 shows an apparatus for pretreating billets as described above and feeding them to a billet heater.

50 is a conveyor that conveys the billet 51, and the conveyed billet 51 is transferred to the pinch roller 52.
It is sent to the preheating heater 53 via. The billet 51, which has been preheated to 150 to 200°C by the preheater 53, is placed in a dipping tank 54. The billet 51 placed in the dipping tank 54 is conveyed to the entrance of the billet heater 56 by a chain conveyor 55, a part of which is immersed in the dipping tank 54. And billet heater 5
6 to be heated to a predetermined temperature.

In the conventional apparatus as described above, the billet 51 is transferred from the preheater 53 to the dipping tank 54.
Since the billet 51 is discharged at the same time, the posture of the billet 51 on the chain conveyor 55 is unstable.Also, since the billet 51 is pushed up by the claw provided on the chain conveyor 55, the billet 51 is Depending on the shape of the cut surface of the billet 51, the posture of the billet 51 may become unstable and stable feeding may not be possible. Furthermore, since the billet 51 is pulled up from the dipping tank 54 by the chain conveyor 54, it is difficult to adjust the dipping time of the billet 51. Furthermore, since a part of the chain conveyor 54 is always immersed in the dipping tank 54, it is necessary to use corrosion-resistant material for the chain conveyor 54, which makes maintenance difficult. There is a drawback that it can cause irritation if dripped onto the skin. or,
Such devices necessarily require a large installation space due to their linear arrangement.

[Object of the Invention] This invention was made to eliminate the above-mentioned problems, and provides a billet that can stably supply a billet, easily adjust the dipping time, and reduce corrosion caused by dipping liquid. The purpose is to provide a conveying device for

[Structure of the Invention] The billet conveying device of the present invention includes first billet feeding devices 3, 4, and 5 that feed the billet to a preheating heater 8 that preheats the billet in advance for coating treatment with a dipping liquid. and a second billet feeding device 20, 21, 22 that feeds the billet to a billet heater 25 that heats the billet to a relatively low temperature for warm forging, and a predetermined direction from the vertical rotation shaft 10a. A billet equipped with elevating cylinders 12, 14 and chucks 13, 15 which can be moved up and down by the elevating cylinders to grip/release the billet at the ends of each of the two extending horizontal arms 11a, 11b. a transfer device 10, and when the billet transfer device 10 is at the first position A by rotation of the rotation shaft 10a, the arm 11a
Vertical movement of the lifting cylinder 12 and chuck 13
By the gripping operation, the billet preheated by the preheater 8 is gripped, and by moving the chuck 15 up and down by the lifting cylinder 14 of the arm 11b, the billet gripped by the chuck 15 is dumped in the dipping tank 16. When the billet transfer device 10 is immersed in the liquid and rotated to the second position B by the rotation of the rotation shaft 10a, the billet held by the chuck 13 is dropped by the vertical movement of the lifting cylinder 12. While being immersed in the dipping liquid in the tank 16, the billet already dipped in the dipping liquid, which was held by the chuck 15, is fed to the second billet by the vertical movement of the lifting cylinder 14 and the release operation of the chuck 15. When placed on the device, the billet transfer device 10 is characterized in that it rotates alternately to the first position and the second position.

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

Reference numeral 1 denotes a parts feeder, and the parts feeder feeds the billets 2 in a state in which they are aligned in the cylindrical direction of the billets 2 and the cut end surfaces of the billets 2 are in close contact with each other. 3 is a chain conveyor that conveys the billet 2 fed from the parts feeder 1; 4 and 5 are a lower slat conveyor and an upper slat conveyor that are provided in a straight line with the chain conveyor 3; 4 and 5 are provided so as to face each other with the billet 2 to be fed in between.

6 is a drive motor for driving the chain conveyor 3 and the lower slat conveyor 4 at a predetermined speed, and 7 is a drive motor for applying downward pressure to the upper slat conveyor 5 to press the billet 2 downward. By pressing the billet 2 against the lower slat conveyor 4, the billet 2 is pushed out as the lower slat conveyor 4 moves.
A preheater 8 preheats the billet 2 pushed out at a constant speed by the lower slat conveyor 4 and the upper slat conveyor 5.

Reference numeral 9 denotes a sensor composed of, for example, a photodiode 9a and a photosensor 9b. 9b are provided on both sides of the travel path of the billet 2, and an optical axis 9c extending from the photodiode 9a to the photo sensor 9b is spaced a length L from the billet discharge surface 8a of the preheater 8 in the discharge direction and is fed. It is provided so as to cross the billet 2.

Reference numeral 10 denotes a turning device provided at a predetermined position on the right side of the billet 2 in the feeding direction E on the side of the preheater 8, and a vertical rotation shaft 10a provided on this turning device can be rotated by 90 degrees. It's becoming like that. 1
1 is two arms 11a and 11b of equal length.
are L-shaped arms extending horizontally and perpendicularly to each other, and are provided at the upper end of the rotation shaft 10a with the bent portion of this arm 11 as a fulcrum. Among these arms 11, one arm 1
When the arm 1a is at a position perpendicular to the feeding direction E of the billet 2, the other arm 11b
is parallel to the feeding direction E. The state of the arm 11 in this position is referred to as A, and the arm 11 is in a position where the arm 11 is rotated 90 degrees clockwise (in the direction indicated by the arrow in the figure) when viewed from above.
Let the state of be B.

A chuck 13, which is raised and lowered by an elevating cylinder 12, is provided at the end of the arm 11a, and a chuck 15, which is raised and lowered by an elevating cylinder 14, is provided at the end of the arm 11b. Reference numeral 16 denotes a dipping tank in which dipping liquid is stored, and is provided in front of the rotating device 10 with respect to the feeding direction E of the billet 2, so that the arm 11 is in the position A as described above. At some point, by lowering the chuck 13, it is possible to grasp the billet discharged from the preheater 8 to a predetermined position, and by lowering the chuck 15, the billet can be grasped onto the mounting table 18a of the dipping device 18. The upper billet can be gripped.

This dipping tank 16 has an elevating cylinder 17.
An immersion device 18 is provided which is raised and lowered by the immersion device 18, and a sensor 19 is provided to detect the billet 2 placed on the mounting table 18a of the immersion device 18. When the sensor 19 detects the billet 2,
The cylinder 17 is operated for a certain period of time, and the immersion device 18
falls for a certain period of time. This allows the dipping device 18
The billet 2 placed on the mounting table 18a is immersed in the dipping liquid in the dipping tank 16 for the predetermined period of time.

20 is a chain conveyor located on the side of the turning device 10 so as to face the preheater 8, and is provided so as to be able to feed billets in a direction F opposite to the billet feeding direction E. ,and,
The chain conveyor 20 is provided at such a position that when the arm 11 rotates to the position B, the billet 2 held by the chuck 15 of the arm 11b is placed on the chain conveyor 20. Also, since the arms 11a and 11b are equal in length and perpendicular to each other, when the arm 11 is in the state B, the chuck 13 of the arm 11a is positioned above the dipping device 18. When the arm 11 is in position B, the gripping portions of the chucks 13 and 15 both perform an operation to release the billet 2 that they are gripping.

Reference numerals 21 and 22 denote a lower slat conveyor and an upper slat conveyor that are provided in a straight line with the chain conveyor 20, and both conveyors 21, 2
2 and 2 are provided so as to face each other with the billet 2 being fed in between. 23 is a drive motor that drives the chain conveyor 20 and the lower slot conveyor 21 at a predetermined speed;
is a pressing cylinder provided to apply downward pressure to the upper slat conveyor 22 to press the billet 2 downward; by pressing the billet 2 against the lower slat conveyor 21, the lower slat conveyor 21 As the billet 2 moves, the billet 2 is pushed out.

25 is a billet heater that heats the billet 2 pushed out at a constant speed by the lower slat conveyor 21 and the upper slat conveyor 22 to a predetermined forging temperature; 26 is the billet heater 2;
This is a shooter for sending the billet 2 heated by 5 to a predetermined location.

Next, the operation of the apparatus configured as described above will be explained. It is assumed that the arm 11a is in the position A, in which the arm 11a is located on the discharge port side of the preheater 8,
It is also assumed that an operation similar to the operation described below has already been performed and the billet 2' has been placed on the mounting table 18a of the dipping device 18.

Billet 2 fed from parts feeder 1
is pushed out at a constant speed toward the preheater 8 by lower and upper slot conveyors 4 and 5 via the chain conveyor 3. When the cut front surface of the billet 2, which has been preheated to 150 to 200°C and discharged by the preheater 8, reaches a position further separated by a length L from the discharge surface 8a of the preheater 8, the billet 2 is 2 is detected. As a result, the cylinder 12 of the arm 11a operates and the chuck 1
3 descends and grips the billet 2.

On the other hand, the cylinder 14 of the arm 11b is operated, and the chuck 15 is lowered to grip the billet 2' which has been immersed in the dipping liquid for a predetermined time in the previous operation and placed on the mounting table 18a.

Next, the cylinders 12, 14 and the chuck 13,
While maintaining the state of step 15, the arm 11 is rotated 90 degrees clockwise in the figure by the operation of the rotating device 10, so that the arm 11a is placed above the dipping tank 16.
The arm 11b is in the state B located on the chain conveyor 20. The billet 2 held by the chuck 13 is placed on the dipping device 18, and the billet 2' held by the chuck 15 is placed on the chain conveyor 20.

Then, the cylinder 12 of the arm 11a is activated, the chuck 13 is lowered and released at a predetermined position, and after placing the billet 2 that was being held on the mounting table 18a of the immersion device 18, the cylinder 12 is activated and the chuck 13 is opened at a predetermined position. The chuck 13 rises. At this time, the cylinder 14 of the arm 11b is operated, the chuck 15 is lowered and released, and the billet 2' that was being held is placed on the chain conveyor 20.

Then, the chuck 15 is activated by the operation of the cylinder 14.
will rise. After this, the rotation device 10 is activated again, and the arm 11 is rotated 90 degrees in the opposite direction, returning to the state A and entering the standby state, and then the preheating heater 8
When the billet 2 discharged from the billet 2 is detected by the sensor 9, the billet 2 is
Soak arm 1 in order for a specified period of time in the dipping liquid.
1b, the billets 2 immersed in dipping liquid are sequentially conveyed onto a chain conveyor 20. The billet 2 placed on the chain conveyor 20 is fed to the billet heater 25 at a predetermined speed by lower and upper slab conveyors 21 and 22.
The billet 2 heated to a predetermined temperature by the billet heater 25 is sent to a warm forging machine (not shown) via a shooter 26.

The apparatus for conveying the billet 2 heated by the preheater 8 to the dipping tank 16 and the apparatus for conveying the billet 2 immersed in the dipping liquid in the dipping bath 16 to the chain conveyor 20 at the subsequent stage are equipped with the above-mentioned right-angled conveyor. Using the arm 11 extending in two directions, in a certain arm position A, the billet 2 heated by the preheater 8 and the billet 2 on the dipping device 18 of the dipping tank 16 are simultaneously held by the chucks 13 and 15, respectively. In addition, in the arm position of another state B, each billet 2 held by the chucks 13 and 15 is
are placed on the dipping device 18 and on the chain conveyor 20, so that the mounting table 1 of the dipping device 18
The cylindrical directions of the billets 2 on the billet 8a and the chain conveyor 20 are placed at fixed angles of 90° and 180° with respect to the billet feeding direction E, respectively. Dipping tank 1 with reliable operation of billet 2
6 and a chain conveyor 20.

Furthermore, due to the rotational movement of the arm 11, the cylindrical 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, so that the billet 2 is Since the feeding direction F can be opposite to the feeding direction E of the chain conveyor 3 that feeds the billet 2 to the preheater 8, the entire device can be configured compactly in a U-shape. , and the installation space can be reduced.

Moreover, by raising and lowering the dipping device 18,
Since the billet on the mounting table 18a of the dipping device 18 is immersed in the dipping liquid, the dipping time can be set accurately, and since the dipping device 18 only moves up and down, Water can be drained on the dipping tank 16, and there is no fear that the dipping liquid will drip to the outside of the dipping tank 16 unlike in conventional devices.

Furthermore, since the dipping device 18 itself has a simple structure, it is not difficult to construct it from a material that is corrosion resistant to the dipping liquid, and furthermore, this dipping device 18 is located outside the dipping liquid except when dipping the billet 2. Since the immersion device 18
corrosion can be reduced.

Then, the preheating heater 8 and the billet heater 25
By using a caterpillar-shaped slat conveyor instead of a conventional vinch roller as the device for feeding the billet 2, there is no risk of damaging the surface of the billet 2.

[Effects of the Invention] As explained above, in this invention, the gripped billet is transferred by the rotation of the arm as described above, so the billet can be stably supplied, and the dipping means that moves up and down can be used. Since the billet is immersed in the dipping liquid, the immersion time can be adjusted accurately, and corrosion on the immersion means can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the billet conveying apparatus of the present invention, and FIG. 2 is a front view of a conventional billet conveying apparatus. 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... Holder cylinder,
8... Preheating heater, 9, 19... Sensor, 10... Swivel device, 10a... Rotating shaft, 11... Arm, 12, 1
4, 18...Lifting cylinder, 13, 15...Chuck, 16...Dipping tank, 18...Dipping device, 2
5... billet heater, 26... shooter.

Claims (1)

[Scope of Claims] 1. A first billet feeding device 3 that feeds the billet to a preheating heater 8 that preheats the billet for coating treatment with a dipping liquid;
4, 5, a second billet feeding device 20, 21, 22 that feeds the billet to a billet heater 25 that heats the billet to a relatively low temperature for warm forging; The two horizontal arms 11a, 11b extending in the direction are equipped with elevating cylinders 12, 14 and chucks 13, 15 which can move up and down by the elevating cylinders to grip/release the billet, at the ends of each arm. and a billet transfer device 10 that moves the arm 11a when the billet transfer device 10 is in the first position A by rotation of the rotation shaft 10a.
Vertical movement of the lifting cylinder 12 and chuck 13
By the gripping operation, the billet preheated by the preheater 8 is gripped, and by moving the chuck 15 up and down by the lifting cylinder 14 of the arm 11b, the billet gripped by the chuck 15 is dumped in the dipping tank 16. When the billet transfer device 10 is immersed in the liquid and rotated to the second position B by the rotation of the rotation shaft 10a, the billet held by the chuck 13 is dropped by the vertical movement of the lifting cylinder 12. While being immersed in the dipping liquid in the tank 16, the billet already dipped in the dipping liquid, which was held by the chuck 15, is fed to the second billet by the vertical movement of the lifting cylinder 14 and the release operation of the chuck 15. 1. A billet transfer device, wherein the billet transfer device 10 is placed on the device and rotates alternately to the first position and the second position.