JPS604993Y2 - Continuous heat treatment furnace quenching equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a quenching device for a continuous heat treatment furnace.

Generally, an overhead conveyor type continuous furnace is used for heat treatment of forged products such as crankshafts and front axles, and FIG. 1 shows an example of its general arrangement.

In Fig. 1, a quenching tank 3 is located between the quenching furnace 1 and the tempering furnace 2.
The quenching tank 3 has a water tank 3A and an oil tank 3B, and water quenching or oil quenching is performed depending on the type of steel.

The overhead conveyors 4 and 5 are located above the quenching furnace 1 and the tempering furnace 2, respectively. The bushing devices 6 and 7 sequentially move inside the furnace.

Pull-out devices 8, 9 using hydraulic cylinders or the like are used to take out the materials from the furnaces 1, 2.

In such a continuous heat treatment furnace, as shown in FIG. 2, the personnel to be burned 10 leaving the quenching furnace 1 is cooled by a quenching device equipped with an elevator 11.

The elevator 11 has a guide rail lla at the bottom that is movable in the lateral direction of the conveyor line, and can be continuous with the guide rail of the conveyor 4 or the conveyor 5.

In such a configuration, in the case of water quenching, the person to be burned 10 held on the overhead conveyor 4 is transferred to the elevator 11 by the pull-out device 8, and the person to be burned 10 is lowered by lowering the elevator 11. is charged into water tank 3A.

Next, when the hardening is completed, the elevator 11 is raised and the guide rail lla is moved laterally toward the tempering furnace, and the overhead conveyor 4 holding the personnel 10 to be burned is sent to the tempering furnace 3 by the pusher device 7.

In the case of oil quenching, the same procedure was used, although the order of operation was different.

However, in the case of oil quenching, the temperature of the coolant is higher than in water quenching, so the immersion time in the coolant is longer, which significantly reduces the processing speed, and furthermore, the number of personnel to be quenched in the quenching furnace is reduced. Staying longer increases fuel costs.

As a result, there were problems such as oil-hardened products being significantly more expensive than water-hardened products.

This idea was created to solve the above-mentioned conventional problems, and by making only slight improvements to the conventional quenching equipment, the work speed of quenching processes such as oil quenching, where the quenching cooling rate is slow, can be increased. The purpose is to provide a quenching device that can be significantly improved.

The quenching device of this invention replaces the conventional elevator with a charging elevator that charges the personnel to be burned into the quenching tank, and further arranges a new elevator for taking out the personnel to be burned from the quenching tank. The personnel to be burnt charged into the quenching tank by the charging elevator is transferred to the unloading elevator by the transfer device, and the released charging elevator is used for charging the next personnel to be burned. , which aims to shorten the processing work.

This invention will be explained below with reference to an illustrated embodiment.

(Note that explanations of parts that are the same as the conventional ones will be omitted.

) As shown in FIG. 3, the elevator 11 is a conventional elevator, and this elevator 11 is used for charging personnel 10 to be burned into the quenching tank 3.

Reference numeral 12 denotes an elevating machine for taking out the newly placed personnel 10 to be burned out from the quenching tank 3.

This elevator 12 has a guide rail 12a that can be connected to the guide rail of the conveyor 5.

In addition, the guide rail lla and the guide rail 12a are connected to the oil tank 3B.
The burnt personnel 10 is suspended from the elevator 11 by a transfer device 13 such as a hydraulic cylinder located below the pusher device 7, with the elevators 11 and 12 continuously lowered.
is transferred to the elevator 12.

Further, the personnel to be burned 10 taken out by the elevator 12 is charged into the quenching furnace 2 by a quenching device 14 using a hydraulic cylinder.

Furthermore, a plurality of stirring nozzles 15 are attached to the bottom of the oil tank 3B.

In the above configuration, the operation in the case of oil quenching is explained. The guide rail lla of the elevator 11 is positioned so as to be continuous with the guide rail of the conveyor 4, and the person to be burned 10 is pulled into the elevator 11 by the pull-out device 8. Transfer.

Next, after moving the guide rail 11a onto the oil tank 3B, the elevator 11 is lowered and the burnt personnel 10 are charged into the oil tank 3B.

Then, the human body 10 to be burned is kept suspended in the oil until the martensitic transformation is completed.

On the other hand, the elevator 12 is lowered and placed adjacent to the elevator 11.

When the transformation is completed, the human being 10 to be burnt is transferred to the elevator 12 by the transfer device 13 and kept stopped until the quenching is completed.

During this time, the released elevator 11 returns to its original position and begins receiving, charging, and cooling the next person to be burned.

The elevator 12 ascends after the quenching is completed, and the charging device 14 charges the personnel 10 to be burned into the tempering furnace 2.

In addition, in the case of water quenching, it can be carried out in the same manner as in the conventional method by fixing the elevator 12 so that the guide rail 12a is continuous with the guide rail of the conveyor 5 without using the elevator 12.

If oil quenching is performed using such a quenching device, the time from the completion of transformation of the person to be quenched to the completion of quenching will be shortened, and the working speed of the quenching process will be reduced to 1.5~ 1.
It improved by about 8 times.

As mentioned above, according to this invention, the conventional elevator is used as a charging elevator, and a new unloading elevator is installed, and when the martensitic transformation of the material to be burnt in the charging elevator is completed, the transfer device is used to incinerate it. Since the material is transferred to the unloading elevator within the loading tank, the work speed can be greatly improved compared to the conventional method, and its practical reliability is great.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing a general arrangement example of a continuous heat treatment furnace;
FIG. 2 is a sectional view showing a conventional hardening device, and FIG. 3 is a sectional view showing a hardening device according to this invention.・In FIG. 3, parts that are the same as or equivalent to the conventional ones are designated by the same reference numerals. 1... Quenching furnace, 2... Tempering furnace, 3...
...Quenching tank, 3A...Water tank, 3B...
...Oil tank, 4,5...Overhead conveyor,
6,7...butsusha device, 8゜9...
Pull-out device, 10... Burned personnel, 11...
...Elevator, lla...Guide rail, 12
...Elevator, 12a...Guide rail,
13... Transfer device, 14... Charging device, 15... Stirring nozzle.

Claims (1)

[Scope of utility model registration request] A charging elevator that suspends the personnel to be incinerated and charges the personnel to be incinerated into the quenching tank, an elevator for taking out the personnel to be incinerated by suspending the personnel to be incinerated and takes out the personnel to be incinerated from within the quenching tank, and the charging elevator. A quenching device for a continuous heat treatment furnace, comprising: and a transfer device for transferring the personnel to be burnt from the charging elevator to the take-out elevator while the take-out elevator is lowered.