JPS6332126Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a container for metal heat treatment, which is used when performing required heat treatment on various metal work parts.

Conventionally, in order to heat-treat various metal work parts (carburizing, quenching, etc.), the bottom and surroundings except for the top surface are made of steel material 1, as shown in Fig. It was a cylindrical or rectangular net housing-like container of an appropriate size, in which the parts to be processed were housed and subjected to heating and cooling processing.

The normal carburizing temperature in the heat treatment furnace is between 750°C and 950°C. In this atmosphere, the parts to be treated are heated and held together with the work container for a certain period of time and then rapidly cooled (oil or water cooled), so the work container is Because the parts to be processed are used repeatedly each time they are replaced, they are deformed due to the effects of thermal stress and cooling stress during rapid cooling from high temperatures. This sometimes caused problems.

In addition, all the materials used to construct the work container are heat-resistant steel and other high-hardness materials, so once deformation occurs, it cannot be repaired and must be replaced with a new container, which is an expensive material. It was hot.

Even if the work container is made of a material with sufficient strength, the deformation will gradually increase over a long period of use.

Therefore, in the present invention, as is clear from the above, if any material cannot withstand long-term use, it will be possible to easily repair or replace it, thereby addressing the drawbacks of the conventional method. That is.

That is, the main point of the present invention is that the container is made up of a side wall member constituting the container and a frame body that holds the same, and that both are separable from each other, and that the side wall member is made of copper.

Hereinafter, the present invention will be explained with reference to an embodiment. The one shown in Figure 2 and below is an embodiment of the present invention, in which the vertical rods 3, 3 are connected between the upper frame 3' and the lower frame 3''. Constructing the container frame, the lower frame 3″
A mesh bottom plate 4 with good ventilation is installed to prevent the parts to be processed from falling off. On the other hand, a cylindrical container 2 or a rectangular container 6 is constituted by a wall plate 5 made of an easily repairable steel plate removably attached between the upper frame 3' and the lower frame 3''. In implementing this, the wall plate 5 can be attached to the container frame by any means such as screwing or binding with wire rods 7 as shown in the figure, and the material of each container frame is heat-resistant steel and the loading weight Use materials that can withstand the

In addition, the wall plate material attached to the container frame is made of copper plate, and may be composed of a single plate or a plurality of plates, which is selected according to necessity, and the net bottom plate 4 is made of copper plate to withstand the weight of the material to be treated. It is made of heat-resistant steel and is separable from the frame so that it can be turned over and used whenever deformation occurs due to repeated use.

As described above, by making the wall plate removable from the container frame, it is possible to repair or replace it immediately if it becomes deformed or damaged.

That is, these work vessels 2 and 6 are filled with parts to be carburized and quenched, and are stacked in two layers and transported into a heating furnace, where they are heated as described above. After being held at high temperature in a furnace for a predetermined period of time, the tool is rapidly cooled with oil or water, and deformation is inevitable as the tool is subjected to heat and cooling stress due to repeated use. Therefore, when the need for repair processing arises, the wall plate 5 is removed from the container frame except for the mounting screws or wire rods, etc., and after appropriate repairs are made, the wall plate 5 is reattached to the frame, or if repair is not possible, the wall plate 5 is removed from the container frame. Replace with.

When repairing such a work container, please use wall plate 5.
Copper plates are used because they are the easiest to repair (in particular, the carburizing and quenching process causes significant deformation, but since copper resists carburizing, it deforms less and is softer), so it can be easily restored to its original state by being lightly hammered. can do.

Note that depending on the content of the heat treatment and the shape of the container, the use of a copper plate is not limited; stainless steel plates or iron plates may also be used, or the container may be surrounded by a wall material that does not allow ventilation as in the present invention. At the same time, it was also observed that the carburizing and quenching effects were higher when this was done.

Regarding this, since the flow of atmosphere from the circumferential direction of the container is completely blocked by the wall plate, there is no flow stagnation due to turbulence inside the container, and the unidirectional flow between the upper input port and the mesh bottom plate is eliminated. By inducing an atmosphere flow, it acts as an atmosphere guide plate and promotes processing.

As described above, this invention allows for extremely efficient repair work when deformation occurs due to repeated action, and even if repair is not possible, only the defective parts need to be disposed of, reducing equipment costs. .

In addition, by completely covering the peripheral side wall, the quality of processed parts is stabilized and processing efficiency is improved, and furthermore, by using thin plates, it is possible to reduce the weight of the container and save energy, which has excellent practical value. This is a very clever idea.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional example of a work container;
FIG. 2 is a partially cutaway perspective view showing an embodiment of the present invention of a work container, and FIG. 3 is a partially cutaway perspective view showing another embodiment of the same. 4... Net bottom board, 5... Wall board.

Claims (1)

[Scope of utility model registration request] A structure of a container for metal heat treatment work, characterized in that a copper wall plate is removably attached along an optional casing-like frame having a mesh bottom plate.