JPH031469Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to the structure of a quenching oil tank device in a trap-shear continuous quenching furnace.

(Prior art) Conventionally, a trap shear type continuous quenching furnace equipped with a trap shear consists of a quenching furnace body that heats and soaks the material to be quenched, and a quenching furnace that heats and soaks the material to be quenched and then quenches it with quenching oil. A one-tank type quenching oil tank device is provided in an integral structure, and an opening/closing door is provided between the two.

(Problem to be solved by the invention) In the trap-shear type continuous quenching furnace configured as described above, objects to be quenched with different quenching conditions are transported at random, and the type of quenching oil is changed depending on the objects to be quenched. If the type of quenching oil is different, that is, if the type of quenching oil needs to be changed due to differences in conditions such as hot, cold specifications, low distortion specifications, high and low internal hardness specifications required for the object to be quenched, the quenching oil tank should be changed each time. This can be done by replacing the quenching oil stored in the equipment with a different type of quenching oil, or by adding several continuous quenching furnaces for each type of quenching oil. As a result, productivity declines,
There are problems such as low-load operation and increased equipment space.

The present invention was developed in view of this point, and is a structure of a two-tank series quenching oil tank device that can arbitrarily select two types of quenching oil and perform quenching of two specifications in one continuous quenching furnace. This is what we are trying to provide.

(Means for solving the problem) Therefore, the technical means of the present invention is to arrange and integrate two quenching oil tank devices of mutually independent structure in series in the quenching furnace main body, and An intermediate door is installed between the quenching oil tank devices to prevent the mixing of different types of quenching oil due to quenching oil scattering. In order to prevent different types of quenching oil from mixing with the quenching oil in the quenching oil tank device during conveyance, an oil pan for preventing the mixture of different types of quenching oil is installed between the conveyor for conveying the quenched material and the quenching oil surface. It is characterized in that the oil pan for preventing the mixing of different types of quenching oil is configured to be movable in the horizontal direction. The two quenching oil tank devices are each independently equipped with a conveyor for conveying the quenched material and a cylinder for raising and lowering the quenched material, and each oil tank is configured to store different types of quenching oil. It's summery. Note that the direction of movement of the oil pan is
It can be provided in any direction as long as it can be displaced in the direction along the quenching oil surface.

(Function) With this configuration, two types of quenching oil can be arbitrarily selected to perform quenching with two specifications. When quenching is performed using quenching oil in the first quenching oil tank device on the side closer to the quenching furnace body, the oil pan for preventing foreign contamination is placed in the second quenching oil tank on the side farther from the quenching furnace body. It is sufficient to move the object to a position corresponding to the conveyor for transporting the object to be quenched in the apparatus. By doing this, the object to be quenched is moved to a position corresponding to the conveyor for transporting the object to be quenched. Even if quenching oil drips from the quenched product, this quenching oil will not fall into the oil pan and mix with the quenching oil in the second quenching oil tank device.

When quenching is performed using the quenching oil in the second quenching oil tank device, move it to a predetermined position that does not correspond to the conveyor for conveying the material to be quenched in the second quenching oil tank device, and in this state, The object to be quenched can be quenched using the quenching oil in the quenching oil tank device No. 2.

(Embodiment) An embodiment of the present invention will be explained below with reference to the drawings. 1 is a trap shear type continuous quenching furnace body equipped with a trap shear 3 for conveying the final processed material (material to be quenched) 2; In the quenching furnace body 1, a first quenching oil tank device 4 and a second quenching oil tank device 5 are sequentially arranged adjacent to each other in series. The exit side of the continuous quenching furnace main body 1 where the final processed material 2 is transported,
That is, an exit intermediate door 6 is provided on the inlet side of the first quenching oil tank device 4 so as to be openable and closable in the vertical direction, and an outlet intermediate door 6 is provided on the inlet side of the first quenching oil tank device 4 so as to be openable and closable in the vertical direction. An intermediate oil tank door 7 is provided on the entrance side of the oil tank so that it can be opened and closed in the vertical direction. Furthermore, the second
An exit door 8 is provided on the exit side of the quenching oil tank device 5 so that it can be opened and closed in the vertical direction.

First quenching oil tank device 4, second quenching oil tank device 5
As shown in FIG. 2, the final treated product 2
Elevator roller chains (conveyors) 9, 10 for conveying the materials, and processed material guides 11 attached to both sides of the elevator roller chains 9, 10.
12 at the bottom of the elevator body 13, 14.
At the upper part of the elevator bodies 13 and 14, there is an elevator cylinder (conveyor raising and lowering cylinder) 1 for raising and lowering the elevator bodies 13 and 14 along elevator raising and lowering guide posts 15 and 16.
7 and 18 are connected. The elevator roller chains 9 and 10 are driven by a chain drive motor 1.
By rotating the chain drive shafts 21, 22 at 9, 20, the motor is actuated via drive transmission pinions 23, 24 that mesh with the chain drive shafts 21, 22. Note that the reference numeral 2 in Figure 1
5, 26 are elevator roller chains 9, 10
Limit switches 27 and 28 in FIG. 2, provided so as to come into contact with the final product 2 above, are elevator lift stoppers for regulating the lift positions of the elevator bodies 13 and 14.

As shown in FIG. 3, the second quenching oil tank device 5
There is an exit chain conveyor 29 outside the exit door 8.
An oil pan 30 for preventing mixing of different types of quenching oil is provided below the outlet chain conveyor 29. This oil pan 30 is arranged at a height between the surface of the quenching oil 35 in the second quenching oil tank device 5 and the elevator roller chain 10.
An in/out cylinder 31 is connected to the base end of the oil pan 30, and when the in/out cylinder 31 extends,
The oil pan 30 moves along an oil pan pocket 32 that is slightly inclined upward, and is guided by an oil pan guide 33 fixed to the lowermost surface of the elevator body 14 to a lower position corresponding to the elevator roller chain 10. It's starting to move forward. A quenching oil recovery pipe 36 is connected to the lowest part of the oil pan pocket 32.

Next, the operation of this embodiment will be explained. still,
Quenching oil 34 stored in the first quenching oil tank device 4
and the quenching oil 35 stored in the second quenching oil tank device 5 are of different types, and in the continuous quenching furnace main body 1, either of the quenching oils 34 and 35 is stored. Final treatment product 2 that requires quenching on one side
It is assumed that the cells are loaded at random, the order of which is stored in an electric circuit (not shown), and that the apparatus of this embodiment is entirely automated.

First, when the final processed material 2 in the continuous quenching furnace main body 1 is quenched with the quenching oil 34 of the first quenching oil tank device 4, the exit intermediate door 6 is opened, and then the elevator roller chain 9 is opened. The operation of the drive motor 19 rotates the chain drive shaft 21 and the drive transmission pinion 23, and at the same time, the final processing material 2 is transferred to the elevator roller chain 9 by the pushing of the trap shear 3, and the final processing material 2 is brought into contact with the limit switch 25. The elevator roller chain 9 stops at the contact position.

When the elevator roller chain 9 stops, the exit intermediate door 6 is closed, and the heat and atmospheric gas inside the first quenching oil tank device 4 are shut off. Thereafter, the elevator body 13 is lowered along the elevator elevation guide post 15 by the operation of the elevator cylinder 17, and the final processed material 2 on the elevator roller chain 9 is quenched by the quenching oil 34.

When the quenching is completed, the elevator body 13 is raised along the elevator lifting guide post 15 by the operation of the elevator cylinder 17, and the final processed material 2
Quenching and oil removal are performed. After this, oil tank intermediate door 7
opens, and at the same time, the oil pan 30 moves forward along the oil pan pocket 32 and the oil pan guide 33 due to the extension operation of the inlet/outlet cylinder 31, and the tip of the oil pan 30 moves into the recess in the inner wall of the second quenching oil tank device 5. (Reference numeral 37 in FIG. 1) and stops at a position directly below the elevator roller chain 10.

Thereafter, the elevator roller chains 9 and 10 are rotated together through the chain drive shafts 21 and 22 and the drive transmission pinions 23 and 24 by the operation of the chain drive motors 15 and 16, and the final processed material 2
When the oil tank intermediate door 7 is conveyed to a position where it contacts the limit switch 26, the oil tank intermediate door 7 is closed. In this case, the quenching oil 34 dripping from the final product 2 falls into the oil pan 30 and does not mix with the quenching oil 35.
Then, the exit door 8 is opened, and the elevator roller chain 10 and the exit chain conveyor 29 are driven to discharge the final processed material 2 from the furnace. After unloading, the outlet door 8 is closed and the oil pan 30 is moved back to its original position in the oil pan pocket 32 by the in/out cylinder 31.

Next, when the final treated product 2 in the continuous quenching furnace main body 1 is quenched with the quenching oil 35 of the second quenching oil tank device 5, as shown in FIG. The intermediate door 7 opens together, and the chain drive motor 1
The chain drive shafts 21 and 22 are activated by the operations of 9 and 20.
Elevator roller chains 9 and 10 are rotationally driven via drive transmission pinions 23 and 24, and transport the final product 2 to a position where it comes into contact with limit switch 26. When the final processed material 2 is transported to a position where it comes into contact with the limit switch 26, the exit intermediate door 6 and the oil tank intermediate door 7 are closed, and then the elevator main body 14 is moved to the elevator vertical guide post 16 by the operation of the elevator cylinder 18. The final treatment object 2 is quenched by the quenching oil 35. Note that when quenching is performed using the quenching oil 35 of the second quenching oil tank device 5, the forward movement of the oil pan 30 by the in/out cylinder 31 is not performed. The operation after quenching is similar to that described above, and the final processed material 2 is transferred to the outlet chain conveyor 29.
The furnace is opened on the side.

In the present invention, the shape of the oil pan is not particularly limited, and the point is that the material to be quenched is placed in the quenching oil tank on the far side from the quenching furnace body. Any size and shape may be used as long as it can receive the quenching oil that drips from the object to be quenched while passing through the device. Preferably, the oil passage is configured so that the quenching oil received by the oil pan returns to the quenching oil tank device on the near side.

(Effects of the invention) As described above, according to the invention, it is possible to arbitrarily select the desired quenching oil from two types of quenching oil for quenching in one quenching furnace. Different types of heat treatments such as carburizing quenching, carburizing chamber quenching, and non-oxidizing quenching can be performed quickly without furnace cooling. Furthermore, as the operating rate of the quenching furnace improves, it becomes possible to significantly reduce the running cost and initial cost of the quenching furnace. Furthermore, since the quenching oil tank device of the present invention, which is located farther from the quenching furnace body, is equipped with an oil pan that prevents the mixing of different types of quenching oils, it is possible to evaluate the distortion effect of two types of quenching oils. Tests can be conducted.

[Brief explanation of the drawing]

FIG. 1 is a schematic longitudinal cross-sectional view showing the internal structure of a two-tank series quenching oil tank device according to an embodiment of the present invention;
The figure is an enlarged front view showing the elevator mechanism of the one shown in FIG. 1, and FIG. 3 is an enlarged side sectional view showing the elevator mechanism of the one shown in FIG. 1. 1... Trap shear type continuous quenching furnace main body, 2
...Final treatment object (hardened material), 4...First quenching oil tank device, 5...Second quenching oil tank device, 7...Oil tank intermediate door, 9, 10...Elevator roller chain ( conveyor), 13, 14...Elevator body,
17, 18... Elevator cylinder (cylinder for lifting and lowering conveyor), 30... Oil pan for preventing mixing of different types of quenching oil, 34, 35... Quenching oil.

Claims (1)

[Scope of utility model registration request] Two quenching oil tank devices equipped with a conveyor for conveying the material to be quenched and a cylinder for raising and lowering the conveyor placed above the quenching oil tank are connected in series to the quenching furnace main body, and An intermediate door is provided between the quenching oil tank devices, and an oil pan is provided between the quenching oil surface of the quenching oil tank device that is farthest from the quenching furnace body and the conveyor to prevent mixing of different types of quenching oil. A structure of a two-tank series quenching oil tank device characterized by being provided so that it can be moved horizontally.