JPH03202416A - Self heating annealing furnace for forged part - Google Patents

Abstract

PURPOSE:To reduce the setting space of the self heating annealing furnace by successively placing forged parts into plural containers in a vertical treating chamber, intermittently driving and traveling the containers in the chamber, annealing the part by self heating with the remaining heat and discharging the annealed part. CONSTITUTION:The upper sprocket 61 in the vertical treating chamber 31 is intermittently driven to intermittently travel plural receivers 81 through a conveyor member 71. When the sprockets 61 and 62 are stopped and the ascending receiver 81 is stopped, a door 51 is opened, and the forged part A on a feeder 91 is forced into the receiver 81 from an inlet 52. The receiver 81 is then raised, turned and lowered, and hence the part A is slowly cooled while giving off its remaining heat and annealed. When the receiver 81 is turned at the lower sprocket 62, the part A is dropped by gravity, the door 53 is opened, and the part A is discharged to a basket 92 from an outlet 54. Consequently, the self heating annealing furnace is miniaturized, and operation is smoothly and safely carried out.

Description

[Detailed description of the invention] Industrial application fields> The present invention relates to a self-thermal annealing furnace for forged products.

BACKGROUND ART In order to impart machinability such as machinability in a subsequent process to a heated steel forged product, the forged product is annealed using a self-heating annealing furnace. The autothermal annealing furnace generally uses the residual heat of the forged product to slowly cool it at 675-b.

The present invention relates to a self-heating annealing furnace used for annealing heated steel forgings, and particularly to a self-heating annealing furnace whose processing chamber is formed into a rigid shape.

<Prior Art> Conventionally, there are various types of self-heating annealing furnaces used when annealing heated steel forgings, such as a roller hearth type, a walking beam type, a cast link type, and a meshheld type. All of these systems have a horizontal processing chamber surrounded by heat insulating material and equipped with a heating source and a fan. The forged product is conveyed in a plane from the left to the right, for example, and the forged product is slowly cooled using its residual heat.

<Problems to be Solved by the Invention> However, all of the conventional self-heating annealing furnaces as described above have a processing chamber formed horizontally, and therefore have a problem in that the installation space is large.

The present invention solves this problem.

Means for Solving the Problems> The present invention provides a self-heating annealing furnace for annealing a forged product by slowly cooling it using its residual heat, which is surrounded by a heat insulating material and has seven heat sources. The interior processing chamber is formed into a solid shape, and the insulating material has an entrance with an opening/closing door on the side thereof, and an exit with an opening/closing door at the bottom of the insulating material. An endless conveying member to which a plurality of receivers for storing the forged products are attached is engaged between the upper sprocket and the lower sprocket, and by intermittently driving one of the sprockets, The present invention relates to a self-thermal annealing furnace for forged products, the gist of which is that the receiver is intermittently moved in an elliptical shape as a whole via the conveying member.

In the present invention, the processing chamber is formed into a rigid shape. The processing chamber is equipped with an upper sprocket and a lower sprocket, and an endless conveying member is engaged between the upper and lower sprockets, and the conveying member has a plurality of receivers for storing forged products. is installed.

Effects> In the present invention having the above configuration, when one of the upper and lower sprockets is intermittently driven, the plurality of receivers are intermittently moved via the conveying member. Such intermittent movements of multiple receivers are all performed in the processing chamber in the vertical direction as a whole by rising → turning along the upper sprocket → lowering → turning along the lower sprocket, rising to the original state, and repeating the above steps It becomes an elliptical intermittent movement. Therefore, when the sprocket is stopped during the receiver's rising stage, if the side opening/closing door is opened and the forgings are sequentially stored from the entrance into the respective receivers, the forgings will be lifted up the receiver. During the turning and descending stages, the material is slowly cooled while gradually reducing its residual heat, and undergoes a predetermined annealing process. The forged product is then removed from the outlet by opening the lower opening/closing door, for example mechanically or by its own weight, during the lowering or pivoting stage of the receiver.

According to the present invention, since the processing chamber is formed into a rigid shape,
Installation space can be reduced. In addition, if the processing chamber has a relatively small capacity, a stirring effect can be obtained by the intermittent lifting, rotation, and lowering of multiple receivers containing forged products, so that the interior of the processing chamber can be can be omitted, and wasted space in the processing chamber can be eliminated accordingly. In this case, by sloping or curving the shoulder portion of the processing chamber downward, it is possible to further eliminate wasted space in the processing chamber and improve the temperature distribution in the processing chamber. In either case, if the upper sprocket is a driving sprocket and the lower sprocket is a floating sprocket supported by the driving sprocket via a conveying member, the thermal expansion of these can be absorbed. Smooth and safe driving can be achieved.

<Embodiment> FIG. 1 is a side view schematically showing an embodiment of the present invention, partially in cross section. A processing chamber 31 is formed into a rigid shape surrounded by a heat insulating material 21 supported by a frame 11, and a heating source 41, 42 and a fan 43 are installed inside the processing chamber 31. The processing chamber 31 has an inlet 52 with an opening/closing door 51 on the side, and an outlet 54 with an opening/closing door 53 on the bottom. In the case of the drawing, the upper sprocket 61 is the driving sprocket, and the lower sprocket 62 is the floating sprocket. An endless conveying member 71 is engaged between the upper and lower sprockets 61 and 62 supported by the frame 11, and the conveying member 71 has a plurality of receivers 81 with only one side end open. installed at intervals.

When the upper sprocket 61 is driven intermittently, the plurality of receivers 81 are intermittently moved via the conveying member 71. Such intermittent movement of the plurality of receivers 81 is as described above. During the rising stage of the receiver 81, while the sprockets 61, 62 are stopped, and thus the receiver 81 is stopped, the opening/closing door 51 is opened and the load is loaded from the inlet 52 onto the charging table 91. When the forged product A is pushed into the receiver 81 and stored,
Forged product A is the rise of the receiver 81 and the upper sprocket 61
During the swirling and descending stages along the curve, the material is slowly cooled while gradually reducing its residual heat, and undergoes a predetermined annealing process. and forged product A
falls from the receiver 81 due to its own weight during the turning stage along the sprocket 62 on the lower side of the receiver 81, so it falls off the opening/closing door 5.
3 is opened and taken out from the outlet 54 into the packet 92. The following is a repetition of the above, but the relationship between the opening/closing of the opening/closing 1151 and the opening/closing of the opening/closing door 53 is that when opening/closing door 51, the opening/closing door 53 is closed, and conversely, when opening/closing door 53, It is preferable to keep the opening/closing door 51 closed.

FIG. 2 is a side view of a main part of another embodiment of the present invention, partially in section. Other structures, such as the heating sources 44, 45, the upper sprocket 63, the conveying member 72, and the plurality of receivers 82, which will not be described, are the same as in FIG. 1, but in this embodiment, the frame 12 In this embodiment, the top of the heat insulating material 22 supported by the insulating material 22 has a semicircular cross section, so that the shoulder of the processing chamber 32 is curved downward, and the processing chamber 32 is not equipped with a fan. Since it is possible to eliminate wasted space in the processing chamber 32 and to improve the temperature distribution, it is particularly suitable for a relatively small self-heating annealing furnace.

The configuration of the present invention has been described above based on the illustrated embodiments, but in each embodiment, for example, various heaters, burners, etc. can be used as the heating source, and upper and lower sprockets can be used as the conveying member. A chain meshing with the packet 92 can be used, and a plurality of receivers can be screwed to the links of the chain with bolts and nuts through reinforcing members if necessary. A conveyor can be used.

<Effects of the Invention> As is already clear, the present invention described above has the effect that the installation space can be reduced, and it is particularly suitable for a relatively small self-heating annealing furnace.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view of one embodiment of the present invention, and FIG. 2 is a partially sectional side view of another embodiment of the present invention. 11.12...Frame body, 21.22...Insulating material 31.32...Processing chamber 41.42, 44.45...Heat source, 43...
Fan 51.53...Opening/closing door, 52...Entrance 5
←...Outlet 81.82.83...Sprocket 71.72...
...Conveyance member, 81.82...Receiver A...Forged product

Claims (1)

[Scope of Claims] 1. A self-heating annealing furnace for annealing a forged product by slowly cooling it using residual heat, the processing chamber being surrounded by a heat insulating material and containing a heating source is rigid. The insulating material has an inlet with an opening/closing door on its side and an outlet with an opening/closing door at the bottom thereof, and an upper sprocket and a lower sprocket installed in the processing chamber are provided. An endless conveying member to which a plurality of receivers for storing the forged products are attached is engaged between the sprockets of A self-heating annealing furnace for forged products, which is constructed so that the entire body is moved intermittently in an elliptical shape. 2. The autothermal annealing furnace for forged products according to claim 1, wherein the upper sprocket is a driving sprocket and the lower sprocket is a floating sprocket supported by the driving sprocket via a conveying member. 3. The autothermal annealing furnace for forged products according to claim 1 or 2, wherein the processing chamber is equipped with a fan. 4. The self-thermal annealing furnace for forged products according to claim 1, 2 or 3, wherein the processing chamber has a shoulder portion which is inclined or curved downward.