JP2589823Y2 - Continuous quenching 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 continuous quenching apparatus, and more particularly, to a continuous quenching apparatus having a quenching chamber in which a plurality of quenching oil tanks are arranged.

[0002] In this specification, the right side of FIG. Also, the left and right are forward.

[0003]

2. Description of the Related Art For example, in continuous carburizing and quenching, two or more continuous furnaces are required to perform quenching with different quenching oil temperatures. Therefore, in order to improve the efficiency of the continuous furnace and reduce the equipment cost, there is a demand for a continuous quenching apparatus having a plurality of oil tanks for charging quenching oils having different quenching oil temperatures. It is necessary to prevent the quenching oil adhering to the quenched material from being mixed into another type of quenched oil when the quenched material is transported and carried out.

As such a continuous quenching apparatus, two quenching oil tank apparatuses each having a conveyor for conveying a material to be quenched and a conveyor lifting / lowering cylinder disposed above the conveyer are connected in series to a heating chamber. And an intermediate door is provided between the two quenching oil tank devices, and a different type is provided between the quenching oil surface and the conveyor in the quenching oil tank device remote from the heating chamber. An oil pan for preventing quenching oil from being mixed is provided so as to be movable in the horizontal direction (see Japanese Utility Model Publication No. 3-1469).

[0005]

However, in a continuous quenching apparatus provided with an oil pan for preventing mixing of different quenching oils, the quenching oil tank has an opening through which the oil pan enters and exits as compared with a single quenching apparatus. Since it is necessary to take measures against gas sealing of the parts, the apparatus becomes complicated and large, and furthermore, there is a problem that the recovered quenched oil cannot be reused because mixed quenched oil is mixed and collected in the oil pan.

An object of the present invention is to provide a continuous quenching apparatus which is simple and compact without mixing different kinds of quenching oil.

[0007]

A continuous quenching apparatus according to the present invention comprises a quenching chamber provided in front of a heating chamber, a carry-in roller conveyor for carrying an object to be quenched from the heating chamber to the quenching chamber, A plurality of quenching oil tanks arranged in series in the quenching chamber in front of and behind the quenching chamber, and the upper space of each quenching oil tank and the upper space of the quenching chamber are loaded with the material to be quenched and vertically moved. Quenching apparatus and a conveyor provided in each elevator for conveying the material to be quenched forward, wherein the quenching chamber is provided with a quenching oil tank on either the left or right side wall of the quenching chamber. baked container unloading port is provided on the outer side of each outlet port, vertical movement Allowed
That the carry-out conveyor such ability, the extraction fork placed in the left-right direction is moved in Jer <br/> unloading conveyor removed the baked initial charge after quenching from the conveyor in the beta are provided It is characterized by the following.

[0008]

According to the continuous quenching apparatus of the present invention, the material to be quenched carried into the quenching chamber is conveyed to the conveyor in the elevator and reaches the elevator located above the quenching oil tank suitable for the quenching. It is immersed in quenching oil and quenched.
After this, the elevator is raised and then outside the quenching chamber
An extraction fork moves below the conveyor in the elevator
In this state, lower the elevator slightly
Then, the material to be quenched is placed on the extraction fork. Then
The extraction fork is retracted to above the carry-out conveyor.
In this state, raising the unloading conveyor
After quenching , the hardened material is transferred from the heating chamber to each quenching oil tank.
In the direction orthogonal to the loading direction .

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

[0010] The continuous quenching apparatus shown in Figs.
The quenching is performed continuously after the carburizing process.The quenching room (2) is provided in front of the carburizing heating room (1) through an intermediate door (4) that can move up and down. ) To the quenching chamber (2) to carry the material to be quenched (W) into the quenching chamber (2) and the front and rear quenching The quenching tanks (11) and (31), and the quenched oil tanks (11) and (31) are provided for each quench oil tank (11) and (31). Front and rear elevators (12) and (32) that move up and down the upper space of), and a roller conveyor that is provided in each elevator (12) and (32) and that conveys the material to be hardened (W) forward. (1
3) and (33), and at the upper part of the right side wall (2a) of the quenching chamber (2), there are outlets (14) and (34) for each quenching oil tank (11) and (31). Near the outside of the exits (14) and (34), the unloading roller conveyor (16) (3
6) and the quenched material (W) after quenching are transferred from the roller conveyors (13) and (33) in the elevators (12) and (32).
Transfer devices (10) and (30) to be mounted on (16) and (36) are provided, respectively.

The two quenching oil tanks (11) and (31) are for storing different types of quenching oil, for example, hot oil is stored in the rear quenching oil tank (11) and quenching oil tank (31) in the front side. ) Is filled with cold oil. Each quenching oil tank (11) (31) is provided with an oil stirring device (25) (45).

Each of the elevators (12) and (32) is constituted by a frame, and the elevator hydraulic cylinders (17) (37)
Respectively. Each elevator (12) (32)
The quenched object (W) is conveyed to the front elevator (12) by the roller conveyors (13) and (33) inside. Each of the roller conveyors (13) and (33) in each elevator is provided with a hardened object stop positioning device (not shown).

An exit door which can be moved up and down is provided at each of the exits (14) and (34).
(19) and (39) are provided respectively.

Each of the transfer devices (10) and (30) includes a fork support fixed below each of the unloading roller conveyors (16) and (36).
(18), (38), extraction forks (15), (35) supported on the top surface of the extraction forks (15), (35), and a roller mounting frame (20) for each of the unloading roller conveyors (16), (36) An air lift (21) for moving the (40) up and down.

Each of the extraction forks (15) and (35) is moved left and right by the reciprocation of the piston rods (22a) and (42a) of the left hydraulic cylinders (22) and (42).
8) Guided by guide rails (23) and (43) fixed on (38), located below roller conveyors (13) and (33) in elevators (12) and (32) in the raised position It reciprocates between an advanced position and a retracted position located above the unloading roller conveyors (16, 36). The rollers of each of the unloading roller conveyors (16) and (36) are composed of front and rear rows of rollers arranged in parallel with a clearance for the passage of the extraction forks (15) and (35). When moving the roller mounting frames (20) and (40) of each unloading roller conveyor (16) (36) up and down,
Since (15) and (35) are located between the front row and the rear row of rollers, there is no interference between the extraction forks (15) and (35) and the unloading roller conveyors (16) and (36).

Of the frames (24) and (44) for mounting the roller conveyors (13) and (33) in the elevator, the right frame (2
4) In the upper part of (44), there are provided notches (24a) and (44a) for insertion of the extraction forks (15) and (35), and the extraction forks (15) and (35)
And the frames (24) and (44) do not interfere with each other. The roller conveyors (13) and (33) are driven by a roller drive chain (not shown) attached to the left frames (24) and (44).

Hereinafter, a quenching process cycle by the continuous quenching apparatus will be described.

In the standby state, each of the elevators 12 and 32 is at the highest position (see FIG. 1). When the carburizing process is completed in the heating chamber (1), the intermediate door (4) is opened by the intermediate door opening / closing hydraulic cylinder (5), and the material to be quenched (W) is transferred to the carry-in roller conveyor (3) and to the rear. It is carried into the quenching chamber (2) by the roller conveyor (33) in the side elevator (32).

If the material to be quenched (W) is to be processed in the rear quenching oil tank (31), the roller and the roller of the rear elevator (32) are moved by a stop positioning device (not shown). It is stopped at a predetermined position on the conveyor (33). If the material to be quenched (W) is to be treated in the front quenching oil tank (11), the roller conveyor in the rear elevator is used.
(33) and the roller conveyor (13) in the front elevator, further conveyed forward and stopped at a predetermined position.

When quenching is performed in the front quenching oil tank (11), the front elevator (12) is lowered by the hydraulic cylinder (17) while the object to be quenched (W) is placed on the quenching oil tank (11). ) And quenched in cold oil. After the quenching is completed, the front elevator (12) is raised by the hydraulic cylinder (17).
Next, the front exit door (19) is opened and the hydraulic cylinder (2
The front extraction fork (15) connected to the piston rod (22a) of (2) is a roller conveyor (13) in the front elevator (12).
(See FIGS. 2 and 3). In this state, when the front elevator (12) is slightly lowered, the material to be quenched (W) is placed on the front extraction fork (15). Next, the front extraction fork (15) is retracted to a position above the front discharge roller conveyor (16). In this state, the front roller mounting frame (20) is raised by the front air lift (21). As a result, the material to be quenched (W) is placed on the front conveyor roller conveyor (16).

Thereafter, the material to be quenched (W) is sent to a washing machine and a tempering furnace (not shown) via a roller conveyor (26) for transporting the next process. The same applies to the case where quenching is performed in the rear quenching oil tank (31).

In the above, the material to be quenched (W) is placed in the quenching chamber (2).
The quenching oil adhered to the quenched material does not mix with other types of quenching oil because the quenching oil is taken out in a direction perpendicular to the conveying direction. Moreover, when a washing machine and a tempering furnace are continuously provided in the continuous quenching apparatus, the line length of all the apparatuses can be reduced.

All moving devices such as a conveyor and a fork for moving the object to be processed (W) are hardened oil tanks (11).
(31) Since it is provided outside and is not provided inside the quenching oil tank (11) (31), even if a failure occurs in these moving devices, the quenching oil tank (11) (31) is hardened. There is no need to extract oil, and the cost and the number of days required for repairing the failure are reduced.

In the above embodiment, two quenching oil tanks are provided. However, the same applies to a case where three or more quenching oil tanks are arranged side by side, and the number of quenching oil tanks can be easily increased. Can be. Also, the conveyor is configured to move up and down.However, the conveyor does not move up and down, and the fork support is movable up and down. The transfer of the material to be quenched may be performed. As in the above embodiment, by moving the extraction fork only in the horizontal direction and using a hydraulic cylinder as a driving source for the extraction fork, the stopping accuracy and the reliability of the operation speed adjustment can be improved.

[0025]

[Effect of the invention] According to the continuous carburizing and quenching device of the invention,
The material to be quenched into the quenching chamber is conveyed to a conveyor in the elevator, reaches an elevator located above a quenching oil tank suitable for the quenching oil, is immersed in quenching oil together with the elevator, and is quenched. , The elevator is raised, and the quenched material to be quenched is orthogonal to the carrying direction from the heating chamber to each quenching oil tank.
Because it is transferred to the direction, rather name that quenching oil adhering to the baked container to again be transported in and out of the baked initial charge is mixed into other types of quenching oils, moreover, the length of the line Shorten
Can be . In addition, the quenching oil tank does not require any special gas sealing measures as in the case of a single quenching device, so that the device is simple and compact. In addition, the quenched hardened
The movable part of the mechanism for transferring objects is for transport that can move up and down
Conveyor and horizontal extraction fork
, Accurate, reliable and
Excellent tenancy.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a continuous carburizing and quenching apparatus according to the present invention.

FIG. 2 is a horizontal sectional view of the same.

FIG. 3 is a transverse sectional view of the same.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

[Explanation of symbols]

(1) Heating chamber (2) Quenching chamber (2a) Left and right side walls (3) Roller conveyor for loading (10) (30) Transfer equipment (11) (31) Quenching oil tank (12) (32) Elevator (13 ) (33) Roller conveyor in elevator (14) (34) Carry-out port (15) (35) Extraction fork (16) (36) Roller conveyor for unloading (W)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-247021 (JP, A) JP-A-48-90012 (JP, A) Jikken Hei 3-1469 (JP, Y2) Jikkichi Sho 61- 35544 (JP, Y2) Jiko 56-8915 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) C21D 1/00-11/00 105

Claims (1)

(57) [Scope of request for utility model registration] 1. A quenching chamber provided in front of a heating chamber (1).
(2), a carry-in roller conveyor (3) for carrying the material to be quenched (W) from the heating chamber (1) to the quenching chamber (2), and a series of quenching chambers (2). Multiple quenching oil tanks arranged (11) (31)
And each quenching oil tank (11) (31)
Elevators (12) and (32) that move up and down inside the quenching chamber (2) with the quenched material (W) loaded therein, and each elevator (12)
(32) and a conveyor (13) (33) for transporting the material to be quenched forward (W), wherein the quenching chamber (2) On the side wall (2a), quench oil tank (11) (3
Each of 1) has a quenched material exit (14), (34).
(14) on the outer side of (34), vertically movable unloading conveyor (16) (3
6), the quenched material (W) is taken out of the conveyors (13) (33) in the elevators (12) (32) after being moved in the left and right direction, and the conveyors (16) (36) Extraction fork (15)
And (35) are provided respectively.