JPS606427Y2 - Quenching bath rectifier - Google Patents

Description

[Detailed description of the invention] The present invention relates to a quenching device that quenches stacked heated metal parts by immersing them in a quenching bath, and in particular, a fan mechanism and a fan mechanism for sending quenching liquid toward the metal parts in the bath. This invention relates to a hardening device equipped with a duct.

Neutral salt bath quenching has been well known as a method for highly accurate quenching.

For example, steel gears and the like are hardened in a stacked state, but when hardening such precision parts, it is necessary to send the quenching liquid uniformly and in a laminar flow to each of the stacked metal parts. It is important to ensure uniformity of quenching,
Conventionally, a duct and a fan mechanism are installed inside the quenching bath.
A device is known in which the quenching liquid is directed toward the metal parts.

However, when using a quenching liquid with a large heat capacity such as a neutral salt bath, it is not possible to simply provide a duct and a fan mechanism as described above to direct the quenching liquid toward the metal parts. It is very difficult to make the flow of the quenching liquid uniform, and if the flow of the quenching liquid becomes uneven, there is a problem that it directly affects the quenching accuracy of the metal parts.

In addition, even if the salt solution flows out uniformly from the duct outlet, the flow will vary greatly between the bottom and top of the stacked parts due to the shape and structure of the metal parts, making it difficult for each metal part to flow uniformly. It is difficult to harden to hardness.

The present invention was made in view of such problems, and
A rectifying plate is provided in the duct for sending the quenching fluid to form a plurality of small passages, and a damper is provided to adjust the flow rate of each small passage.By externally operating this damper, the stacked state and individual It is an object of the present invention to provide a quenching bath rectifier that can adjust the flow of quenching liquid to be uniform and laminar to individual metal parts, depending on the shape of the metal parts.

Hereinafter, the present invention will be specifically explained with reference to the illustrated embodiments.

In FIG. 1, 1 is a quenching bath filled with quenching fluid, and 2 is a group of metal parts 4 stacked on a pallet 3 (for simplicity, they are simply shown as squares in the figure).

) is immersed in a quenching salt bath (hereinafter referred to as quenching bath) A, and lifted from the quenching bath A after quenching. 5 is a duct provided in the quenching bath 1, and the duct 5 is A fan 6 for feeding the quenching liquid into the duct 5 is provided in the opening 5a, and a drive shaft 7 of the fan 6 is connected to a motor 8 installed on the top surface of the quenching bath 1.
Driven by

The outlet 5b of the duct 5 is opened vertically upward so that the quenching fluid sent by the fan 6 can be sent toward the metal parts group 4, and the outlet 5b is opened vertically upward from approximately the middle of the duct 5.
In the part leading to b, a plurality of small passages 9 and 9 are formed inside the duct 5.
. . , 9 are provided with rectifying plates 10, . . . , 10.

This current plate 10. .... 10 so that the flow velocity and flow rate inside each small passage 9 are uniform, so that when flowing out from the outlet 5b of the duct 5, a uniform laminar flow is formed over the entire lower surface of the metal parts group 4. The rectifying plate 10. . . , a rectangular damper 11 is provided at a portion corresponding to the entrance of each of the 10 small passages 9 to adjust the flow rate of the small passage 9 as necessary.

This damper 11 may be provided in each small passage 9, respectively.

As shown in FIG. 2, this damper 11 is configured such that both ends of a rotating shaft 12 provided along the front edge are rotatably supported by bearings 13, 13 attached to the side walls 5c, 5d of the duct 5, respectively. , can be freely opened and closed with respect to the entrance opening of the small passageway 9.

One end of the rotating shaft 12 is fixed to one end of an opening/closing lever 14 that is perpendicular to the rotating shaft 12 on the outside of the duct 5, and the other end of this opening/closing lever 14 is fixed to the lower end of a long adjustment rod 15. The connecting member 1 is arranged so that it is not linked to the rotation of the adjustment rod 15 but only to the vertical movement of the adjustment rod 15.
Connect by 6.

The adjustment rod 15 extends long upward, and as shown in FIG. It is supported by being screwed into a nut 18 attached to a support frame 17.

Therefore, when the nut 18 is rotated in a desired direction, the adjustment rod 15 moves up and down relative to the nut 1B, and in response to the up and down movement, the opening/closing lever 14 rotates the rotation shaft 12 of the damper 11, and the damper 11 can be opened and closed.

The damper 11 adjustment mechanism is provided independently for each damper 11 so that the flow rate of each small passage 9 can be adjusted independently.

Therefore, when quenching another metal part with a different shape after the entire required amount of metal parts has been quenched, a test is carried out in advance to ensure that the quenching liquid flows uniformly at the middle position of the stack of metal parts. The opening degree of the damper 11 may be changed based on the information obtained.

As is clear from the above, the present invention provides a rectifying plate at least at the outlet of the duct that guides the quenching fluid sent by the fan toward the group of immersed metal parts, and the inside of the duct is divided into a plurality of small The present invention provides a quenching bath rectifier characterized by partitioning into passages and providing an externally operable damper for adjusting the flow rate of each small passage.

According to the present invention, the quenching liquid can be sent uniformly and laminarly to the group of metal parts to be hardened, and the flow rate can also be adjusted. The flow of the liquid can be optimally adjusted, and individual metal parts can be hardened uniformly.

Note that the present invention is applicable not only to salt bath type quenching equipment but also to oil quenching equipment.

[Brief explanation of drawings]

FIG. 1 is a schematic overall explanatory diagram of a quenching salt bath type quenching apparatus according to the present invention, and FIG. 2 is a perspective view showing a damper mechanism according to the present invention. 1... Quenching bathtub, 2... Lifting platform, 4.
...Metal parts group, 5...Duct, 6...
...Fan, 9...Small passage, 10...
... Rectifier plate, 11 ... Damper, 14 ...
・Opening/closing lever, 15...adjustment rod.

Claims (1)

[Claim for Utility Model Registration] In a bathtub equipped with a fan mechanism and a duct for sending quenching liquid to stacked metal parts, the quenching liquid flows in a laminar flow as a whole at least on the outlet side of the duct. A rectifying plate is provided to form a plurality of small passages, a damper is provided inside the duct to adjust the passage area of each small passage, and an adjustment mechanism for operating the damper is provided externally to control the area of each small passage. A straightening device for a quenching bath, characterized in that the amount of quenching liquid is adjusted so that the quenching liquid flows uniformly to each metal part.