JP2601535Y2 - Heat treatment equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment apparatus capable of quenching a work heated in a closed box type heat treatment furnace by immersing the work in a cooling liquid in a cooling liquid tank.

[0002]

2. Description of the Related Art A heat treatment apparatus for heat-treating a continuously conveyed work can be roughly classified into a continuous heat treatment furnace in which a work is continuously carried into a tunnel-type heat treatment furnace having both ends opened and passed while passing at a constant speed. Processing type (Japanese Unexamined Patent Publication No.
No.-84321), the workpieces are sequentially loaded into a plurality of parallel-boxed heat treatment furnaces, and the doors thereof are closed.
A batch processing type in which the opening / closing door is opened after a certain time has elapsed to sequentially carry out the work (Japanese Patent Application Laid-Open No. 61-76)
No. 873).

[0003] The former type is excellent in continuously heat-treating the same shape under the same heat treatment conditions, but when heat-treating relatively small parts, individual works are hung on a hanger. However, when heat-treating a large-sized work, the entire heat-treating furnace becomes large. Therefore, when heat-treating such fine parts and large-sized work, the latter type is used.

In this batch processing type heat treatment furnace, for example, when quenching is performed for the purpose of obtaining the maximum hardness of a metal material, a workpiece heated to a predetermined temperature must be immersed in water or oil and rapidly cooled. Therefore, normally, a cooling liquid tank is provided below the work loading / unloading port, and the unloaded work is placed on a lift, and the lift is lowered by an elevator device so that the work is immersed in the cooling liquid in the cooling liquid tank. ing.

[0005]

However, while the work is immersed in the cooling liquid tank, the lift is lowered into the cooling liquid tank, and the next work is subjected to the heat treatment furnace until the cooling processing is completed. Because it can not be brought into
There was a problem that wasted time was wasted and work efficiency was poor. In view of the above, the technical problem of the present invention is to improve the work efficiency by loading a next work into a heat treatment furnace and starting a heat treatment while lowering the lift to cool the work.

[0006]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a lift for loading a work to be carried into and out of a closed box type heat treatment furnace, and a cooling device formed below the work loading / unloading port. In a heat treatment apparatus provided with an elevator device for lowering a work into a cooling liquid and lowering the work in a cooling liquid, a heat treatment is performed when one work is immersed in the cooling liquid in the cooling liquid tank by lowering the lift. auxiliary guide rollers for supporting the other workpiece to be loaded and unloaded into the furnace, of the carry-Detchi to advance and retreat for the workpiece carrying-Detchi
It is arranged on the frame arranged on both the left and right sides so that it can rotate up and down,
The auxiliary guide roller according to the descent and rise of the lift
The operating rod that moves and retracts is attached to the lift
It is characterized by having been done.

[0007]

According to the present invention, the work placed on the lift is loaded into the heat treatment furnace while the lift is positioned at the loading / unloading height of the work, or the heated work is transferred from the heat treatment furnace to the lift. To be carried out. Next, in the case of quenching, the lift on which the work is placed is directly lowered into the cooling liquid tank, the work is immersed in the cooling liquid, and after a predetermined time has elapsed, the lift is raised to the carry-in / out height, and then the crane or the like is used. The workpiece is sent to the next process using.

When the lift is lowered into the cooling bath, the auxiliary guide rollers are advanced from both the left and right sides toward the work loading / unloading path, and the work is placed on the guide rollers and loaded into the heat treatment furnace. Alternatively, since one work can be taken out of the heat treatment furnace, another work is carried into the heat treatment furnace while one work is being cooled, and the heat treatment of the other work is started, and the heating of the other work is started. When the return process is completed, the other work can be carried out while one work is being cooled, thereby improving work efficiency.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings. FIG. 1 is a front view showing a heat treatment apparatus according to the present invention, and FIG. 2 is a side view thereof.

In FIG. 1, reference numeral 1 denotes a closed box type heat treatment furnace for heating a work W at a predetermined temperature.
The elevator device 4 that raises and lowers the lift 3 on which the work W is placed is installed on the front side, and is mounted on the lift 3 with the lift 3 positioned at the upper limit position. The heated work W is carried into the heat treatment furnace 1, the heated work W is carried out onto the lift 3, and then the lift 3 is lowered into the cooling liquid tank 5 to move the work W
Is immersed in a cooling liquid.

Reference numerals 6 and 6 denote auxiliary guide rollers for supporting another work W carried into and out of the heat treatment furnace 1 when one work W is immersed in the cooling liquid tank 5. It is vertically rotatably attached to the frame 7 of the elevator device 4 so as to advance and retreat from both left and right sides toward the exit, and the lift 3 can be moved up and down by operating rods 8, 8 erected on both right and left sides of the lift 3. It is configured to be rotated by following.

That is, when the lift 3 is at the lower end position, the operating rod 8 is disengaged from the auxiliary guide roller 6 and the auxiliary guide roller 6 advances toward the work loading / unloading path. The rod 8 pushes up the auxiliary guide roller 6 so that the guide roller 6 retreats from the work loading / unloading path.

The above is an example of the configuration of the present invention, and its operation will be described below. First, the work W transported by the crane conveyor (not shown) is placed on the lift 3 positioned at the upper limit position. Then, after the work W is loaded into the heat treatment furnace 1 and heated for a predetermined time, it is carried out on the lift 3, and when quenching is performed, the lift 3 is lowered into the cooling liquid tank 5 by the elevator device 4 to cool the cooling liquid. The work W is immersed therein. At this time, since the auxiliary guide roller 6 is rotated upward and retracted from the work loading / unloading path, the auxiliary guide roller 6 does not become an obstacle when the lift 3 is lowered.

Next, while the lift 3 reaches the lower end position and cools the work W, the operation rod 8 is disengaged from the auxiliary guide roller 6 and the guide roller 6 advances into the work carry-in / out path. Therefore, while cooling the preceding work W,
Auxiliary guide roller 6 for the next work W on the crane conveyor
And can be carried into the heat treatment furnace 1 so that the efficiency of the heat treatment is improved without wasting time.

Then, the workpiece W to which the cooling process has been completed
When the lift 3 is lifted up when taking out, the operating rod 8 pushes up the auxiliary guide roller 6 and rotates upward to retreat from the work loading / unloading path.
The lift 3 can be raised to the upper limit position without the auxiliary guide roller 6 being in the way. Next, work W
Is transported to the next process by a crane conveyor.

FIG. 3 is a front view showing another heat treatment apparatus according to the present invention. Portions that are the same as those in FIGS. 1 and 2 are given the same reference numerals and will not be described in detail. In this example, closed box-type heat treatment furnaces 1, 1... Are arranged side by side with their work loading / unloading ports facing the front. And an elevator device 4 for raising and lowering the lift 3 on which the work W is placed, on the work carrier 9 movably disposed along each heat treatment furnace 1;
A cooling liquid tank 5 for lowering the lift 3 and immersing the work W is placed thereon.

The work transfer cart 9 has an auxiliary guide roller 6 for supporting another work W carried in and out of the heat treatment furnace 1 when one work W is immersed in the cooling liquid tank 5.
Are arranged so as to be able to advance and retreat from both the left and right sides toward the loading / unloading path of the work W, and can be turned up and down by operation rods 8 erected on both the left and right sides of the lift 3 as in FIG. Has been established.

Therefore, in this example, when the work W is continuously conveyed, the work W is sequentially carried into each heat treatment furnace 1, and the work W after the heat treatment is carried out of the heat treatment furnace 1 and cooled as it is. Can be immersed in the liquid tank 5,
Further, during cooling, the workpiece W to be transported next is placed on the auxiliary guide roller 6 and is carried into the heat treatment furnace 1.
Is the work W tempering heating is finished out transportable from the heat treatment furnace 1 on the auxiliary guide roller 6 can be sent to the next step.

[0019] Since the auxiliary <br/> guide roller 6 is retracted from the workpiece carry Detchi when raising and lowering the lift 3,
There is no hindrance to lifting and lowering the lift 3. If different temperatures are set for the respective heat treatment furnaces, heat treatment can be performed at a temperature corresponding to each heat treatment condition, even if works having different heat treatment conditions are continuously transported.

[0020]

As mentioned [devised effect described above, according to the present invention, the auxiliary guide roller for supporting the other workpiece to be loaded and unloaded into the heat treatment furnace, since it is arranged movably towards the workpiece carry-Detchi While lowering the lift and immersing one work in the coolant in the coolant tank, another work can be loaded on the auxiliary guide roller and carried into and out of the heat treatment furnace, saving time. Thus, the working efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a heat treatment apparatus according to the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a front view showing another heat treatment apparatus according to the present invention.

[Explanation of symbols]

 W ... Work 1 ... Heat treatment furnace 2 ... Work loading / unloading port 3 ... Lift 4 ... Elevator device 5 ... Cooling liquid tank 6 ... Auxiliary guide roller 8 ... Operation rod 9 ... Work transfer carts

Claims (2)

(57) [Scope of request for utility model registration] 1. A lift (3) for placing a work (W) to be carried into and out of a closed box type heat treatment furnace (1), and a cooling liquid formed below the lift (3) below the work carry-in / out port (2). In the heat treatment apparatus provided with an elevator device (4) for lowering the work (W) into the cooling liquid by lowering the work (W) into the tank (5), the lift (3) is lowered to cool one work (W). An auxiliary guide roller (6) for supporting another work (W) carried into and out of the heat treatment furnace (1) when immersed in the cooling liquid in the liquid tank (5) is provided with a work (W).
Left and right of the loading Detchi to advance and retreat for the carrying-Detchi
Vertically rotatable on frames (7) arranged on both sides
And the auxiliary gear is moved in accordance with the lowering / raising of the lift (3).
An operating rod (8) that advances and retracts the id roller (6)
Is mounted on the lift (3) . 2. A closed box-type heat treatment furnace (1) is arranged side by side with its work loading / unloading port (2) facing the front.
Work carrier trolley (9) including an elevator device (4) for raising and lowering a lift (3) on which a work (W) is placed, and a cooling liquid tank (5) for lowering the lift (3) and immersing the work (W).
There is disposed movably along the heat treatment furnace (1), wherein the workpiece transfer carriage (9), the lift (3) coolant tank was lowered one workpiece (W) (5) An auxiliary guide roller (6) for supporting another work (W) carried into and out of the heat treatment furnace (1) while being immersed in the cooling liquid in the inside
But, so as to advance and retreat for the loading of the work (W) Detchi This
Up and down on the frames (7) arranged on both left and right sides of the loading / unloading path
The lift (3) is arranged rotatably and responds to the
Operation to advance and retract the auxiliary guide roller (6)
A heat treatment apparatus characterized in that a working rod (8) is attached to the lift (3) .