JPH06235019A - Quenching vessel - Google Patents

Abstract

PURPOSE:To uniformly quench the whole body even in the case of being a product to be quenched having bad flowing part of quenching liquid in a part, in a quenching vessel for applying the quenching by dipping the product to be quenched into the quenching liquid stored in the liquid vessel. CONSTITUTION:In the quenching zone 10 for dipping the product to be quenched in the liquid vessel 4, the quenching liquid is made to flow by a flowing means. Flowing velocity of the quenching liquid in each part of the quenching zone 10 is adjusted by flowing velocity adjusting mechanism 20. By adjustment of the flowing velocity adjusting mechanism 20, the quenching liquid having sufficiently fast flow rate can be made to flow even in the bad flowing part in the product to be quenched.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quenching tank in which a product to be quenched is immersed in a quenching liquid stored in a liquid tank for quenching.

[0002]

2. Description of the Related Art In a liquid tank, a quenching liquid is circulated by a fan in a place for submerging the quenching product, and the quenching product submerged therein is rapidly cooled by the circulating quenching liquid. Quenching (for example, Japanese Patent Laid-Open No. 3-905).
No. 11). In such a case, when the product to be quenched has a uniform shape as a whole, any part of the product to be quenched is brought into contact with a quenching liquid with a sufficiently fast flow to quench the product. It is possible to prevent the formation of a vapor film on the surface of the product and quench the entire product uniformly.

[0003]

However, when the product to be hardened has a shape having a part where the quenching liquid has poor flowability, a vapor film is formed on the surface of the product to be hardened at that part. However, the heat transfer is hindered at that part and the cooling is delayed as compared with the other parts, and as a result, there is a problem that uneven burning occurs in the entire product to be hardened.

The present invention has been made in order to solve the above-mentioned problems (technical problems) of the prior art, and is a product to be hardened having a shape having a portion where the flowability of the quenching liquid is poor. Even
It is an object of the present invention to provide a quenching tank capable of uniformly quenching the whole.

[0005]

In order to achieve the above object, in the quenching tank of the present invention, a quenching zone for submerging a product to be quenched is defined in the solution tank containing the quenching solution. In addition, in the quenching tank provided with a circulating means for circulating the quenching solution toward the quenching zone in the liquid tank, the quenching solution from the circulating means to the quenching zone A flow rate adjusting mechanism for adjusting the flow rate of the quenching liquid in each part of the quenching zone is provided in the middle of the flow path.

[0006]

When the product to be quenched is submerged in the quenching zone, the product to be quenched is rapidly cooled by the quenching liquid flowing therethrough. In this case, if the product to be quenched has a shape with a part where the quenching liquid has poor flowability, a sufficiently fast flow of quenching liquid is also applied to that part due to the flow rate adjustment mechanism. When distributed,
It is possible to prevent the formation of a vapor film on the surface there.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a container for maintaining airtightness of a space for quenching a product to be quenched, and is a vacuum container for performing quenching in a vacuum state by connecting a decompression device (not shown). When quenching in a pressurized state, it is advisable to connect a pressure device for increasing the pressure inside the container. Such containers are called pressurized containers. Reference numeral 2 is an enclosure portion that encloses a space 2a in the container 1 for handling a product to be quenched, and includes a connection portion 3 for connecting to a heating furnace. Reference numeral 4 denotes a liquid tank provided in the container 1. In this example, the liquid tank is composed of a lower half portion of the container 1 in order to save constituent materials. Reference numeral 5 is a quenching liquid stored in the liquid tank 4, and well-known quenching oil or water is used. 6 shows the liquid level. As shown in FIG. 2, the liquid tank 4 has a main part 7 having a large planar shape so as to accommodate a large product to be hardened and, in the case of a small product, a large number of products to be hardened, and It is composed of a sub-portion 8 which accommodates a structure for distribution and has a small planar shape so that the distribution operation can be performed efficiently. Reference numeral 10 denotes a quenching zone for submerging the product to be quenched, which is defined in the main portion 7. Reference numeral 11 is a transporting means for sunk and withdrawing the product to be quenched in the quenching zone 10, and a crane is exemplified. 12 indicates a product to be hardened. The bulky product to be hardened 12 is handled alone by the transporting means, and the small bulky product to be hardened 12 is handled by the transporting device in a state where a large number of the hardened products 12 are loaded on a loading jig or housed in a cage.

Next, reference numeral 13 denotes a circulation means for circulating the quenching liquid toward the quenching zone 10, which is used, for example, by a fan as shown because of its simple structure and sufficiently large circulation capacity. To be The fan is also called a stirring fan because it stirs the quenching liquid in the liquid tank. Reference numeral 14 denotes a quenching liquid guide means for efficiently exerting the flow of the quenching liquid by the circulation means 13 on the quenching zone 10. Reference numeral 15 denotes a flow path of the quenching liquid from the flow means 13 defined by the guide means to the quenching zone 10. The guide means 14 is composed of a plurality of guide members 16-18. Reference numeral 16 is a guide member for sending the flow of the quenching liquid formed by the circulation means 13 to the next stage with little loss, and is formed in a cylindrical shape that is slightly larger than the planar shape of the circulation means 13. The guide member 16 is attached to the sub portion 8 of the liquid tank 4, and the guide member 16 is provided with the above-mentioned flow means.
13 is installed. Reference numeral 17 is a guide member for mainly regulating the flow of the quenching liquid in the main portion 7 only in the quenching zone 10, and is for ensuring that the flow of the quenching liquid is efficiently applied to the product to be quenched. is there. This guide member 17 has reference numerals 17a to 17d.
And the guide plates 17a, 17 on the side wall of the main part 7
It is configured with a portion located between b. Information board 17
C and 17d are smoothly curved so that the flow of the quenching liquid is smoothly directed to the quenching zone 10. 18 is a guide member 1
A guide member connecting between 6 and 17 has an enlarged portion 19 for smoothly spreading the narrow-width quenching liquid flow from the inside of the guide member 16 toward the entire space inside the guide member 17.

Next, 20 is a flow rate adjusting mechanism provided for adjusting the flow rate of the quenching liquid in each part of the quenching zone in the middle of the flow path of the quenching liquid from the flow means to the quenching zone. Indicates. The mechanism 20 is capable of adjusting the flow velocity of any part of the entire quenching zone 10 so as to be adjusted in two directions, that is, the direction indicated by the arrow X in FIG. 2 and the direction indicated by the arrow Y in FIG. I can do it. Reference numeral 21 denotes an adjusting element for adjusting the X direction, and a plurality of flow direction adjusting members 23, 23, ... For adjusting the flow direction of the quenching liquid in the horizontal plane.
・ It is composed by. The member 23 is exemplified by a straightening vane pivotally attached to the upper wall of the enlarged portion 19 so that the member 23 can be turned in the horizontal direction. Reference numeral 22 denotes an adjusting element for adjusting the Y direction, which is constituted by flow direction adjusting members 24, 24 for adjusting the flow direction of the quenching liquid in the vertical plane. The member 24 is, for example, a straightening plate, and is a bearing mounted on the bottom wall of the main portion 7.
It is mounted on a shaft 26 which is supported horizontally by 25.

Next, reference numeral 30 denotes an operating mechanism for operating the flow velocity adjusting mechanism 20 from the outside of the quenching liquid.
Includes 22 individual operating elements 31, 32 for individual operations. Reference numeral 33 indicates an operating portion of the element 31, which is a holder attached to the liquid tank 4.
34, a plurality of operation pieces for individually operating the members 23, 23 ...
35, 35 ... Are pivotally mounted so that the direction can be adjusted in the horizontal plane. Each operation piece 35 holds the holding body at various adjustment positions.
It can be fixed to 34. 36 is the member 23 and the operation unit
A rod that connects the central part of the pivot of the operation piece 35 and the central part of the pivot of the member 23 by the interlocking means with 33 is illustrated. 37 is element 32
The operation part in FIG. 3 is shown, and the operation pieces 39, 39 for individually operating the members 24, 24 can be vertically adjusted and fixed at various adjustment positions with respect to the holder 38 attached to the liquid tank 4. It is constructed by being attached. Reference numeral 40 denotes an interlocking means of the member 24 and the operating portion 37, a crank member 41 attached to the shaft body 26, and a connecting rod 42 having one end pivotally attached to the crank 41 and the other end fixed to the operation piece 39.
The mechanism consisting of and is illustrated. The operation parts 33 and 37 may be provided outside the container 1 to facilitate the operation from the outside of the container.

Quenching of a product to be quenched by the quenching tank having the above structure will be described. The circulation means 13 is activated, and an arrow 44 is drawn in the liquid tank 4.
The flow of quenching liquid indicated by is generated. The product to be quenched 12 heated in the heating furnace is conveyed to the space 2a, and is submerged in the quenching liquid 5 in the quenching zone 10 by the conveying means 11. The article to be quenched 12 is rapidly cooled and quenched by the quenching liquid flowing around the article to be quenched 12 in the quenching zone 10. In this case, the quenching liquid flowing on the surface of the quenching target 12 prevents the formation of a vapor film on the surface of the quenching target 12, so that the heat transfer between the quenching liquid 5 and the quenching target 12 is prevented. It is done well and the rapid cooling is done properly.
The quenched product 12 that has been quenched is lifted up to the space 2a by the conveying means 11 and is carried out in the same manner as in the well-known quenching tank.

When the above-mentioned product to be quenched has a shape having a portion where the quenching liquid has poor flowability, the members 23 and 24 are appropriately adjusted by operating the operation portions 33 and 37, and the quenching is performed. Entry zone 10
In the above, a large amount of quenching liquid is directed to the place where the above-mentioned poor flowability is located, and the flow velocity of the quenching liquid there is increased. If the quenching operation is performed in this state in the same manner as above, the quenching liquid will flow along the surface of the article to be quenched 12 rapidly even in the poorly flowable portion of the article to be quenched, and a vapor film will form on the surface. To prevent the occurrence of. Therefore, uniform quenching of the entire product to be quenched can be performed. Even when a plurality of products to be hardened are loaded, even if there is a portion where the quenching liquid has poor flowability due to the loading state, uniform hardening of all the products to be hardened is made by performing the same adjustment as above. It is possible to enter.

Next, in order to make it possible to adjust the flow rate of the quenching liquid as described above even while the heating furnace is in operation, the operating parts 33 and 37 are provided outside the container as described above, or the above-mentioned flow is performed. Actuators may be attached to each of the direction adjusting members 23 and 24 so that the actuators can be remotely operated from outside the container 1. Further, in order to prevent vapor accumulation from occurring in a part along the surface of the product to be quenched, the flow rate adjusting mechanism is configured so that the flow rate of the quenching liquid in each part of the quenching zone 10 is repeatedly changed in height. An operating device for operating the flow velocity adjusting mechanism may be attached. The operating device may be, for example, one that operates the actuator to change the direction of the flow direction adjusting members 23 and 24 continuously or intermittently. When such an operating device is used, the rapid flow of the quenching liquid repeatedly undulates on the surface of each part of the article to be quenched in the quenching zone 10, and vapor pooling can be effectively prevented.

[0014]

As described above, in the present invention, when the heated article to be quenched 12 is submerged in the quenching solution 5 in the quenching zone 10, the quenching solution flowing in the zone 10 flows. Of course, the product to be quenched can be quenched by quenching, and in the above case, even if the product to be quenched 12 has a part having a poor flowability of the quenching liquid, It is possible to prevent the formation of a vapor film on the surface of the quenching liquid by causing a rapid flow of the quenching liquid to flow through the above-mentioned portion by the flow velocity control mechanism 20 and to quench the entire article to be quenched. is there.

[Brief description of drawings]

FIG. 1 is a vertical sectional view.

FIG. 2 is a horizontal sectional view.

[Explanation of symbols]

 1 container 4 liquid tank 10 quenching zone 13 flow means 20 flow rate adjusting mechanism

Claims (3)

[Claims] 1. A quenching zone for submerging a product to be quenched is defined in a liquid tank containing the quenching liquid, and the quenching liquid is directed toward the quenching zone in the liquid tank. In a quenching tank provided with a circulation means for circulating, the flow rate of the quenching fluid in each part of the quenching zone is adjusted in the middle of the flow path of the quenching fluid from the circulation means to the quenching zone. A quenching tank characterized by being provided with a flow rate adjusting mechanism for carrying out. 2. The flow rate adjusting mechanism is provided with an operating device for operating the flow rate adjusting mechanism so as to repeatedly change the flow rate of the quenching liquid in each of the portions. Quenching tank. 3. The quenching tank according to claim 1, wherein the liquid tank is provided in a vacuum container or a pressure container.