JPS6235464B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous steel plate hardening apparatus that continuously hardens a steel plate by passing the steel plate into a cooling tank.

In order to increase the cooling rate of the steel plate and perform quenching work efficiently, it is necessary to increase the relative speed between the surface of the steel plate and the cooling water. For this reason, conventionally, a cooling means has been employed in which pressurized cooling water is injected from a nozzle and collides with the surface of the steel plate.

However, when using this cooling means, the equipment for pressurizing the cooling water becomes large and the amount of cooling water used becomes enormous, resulting in the disadvantage that the quenching equipment is expensive and the operating costs increase. Furthermore, as the water supply piping becomes thicker, the space occupied by the piping increases, which not only necessitates an increase in the height and length of the quenching equipment, but also increases the weight of the piping and its internal parts, which requires reinforcement of the frame, etc. There is a need.

In addition to this, the pitch of the parallel piping becomes large, making it difficult to increase the jet water flow density, and the cooling capacity must be reduced. In addition, clogging of the cooling water nozzle causes uneven quenching.
This has the disadvantage that the time and cost required for repairing clogging increases.

In order to solve these problems, the present inventors have already invented and filed an application for a "continuous steel sheet hardening apparatus." (Japanese Unexamined Patent Application Publication No. 57-92141, hereinafter referred to as the "prior application.") Hereinafter, the outline of this prior application will first be explained with reference to the drawings.

Figures 1 to 4 are configuration diagrams of the earlier application, and
FIG. 1 is a side sectional view, and FIGS. 2 and 3 are sectional views taken along lines - and - in FIG. 1, respectively.

In FIG. 1, reference numeral 10 denotes a water storage tank, and an opening 11 for inserting a steel plate 12 to be hardened is provided in the opposite wall thereof. Moreover, there are rolls 1 inside for holding the steel plate 12 from above and below and conveying it in the direction of arrow C.
6 and 18 are provided. This roll 16,1
8 is rotationally driven in the directions of arrows A and B by drive devices 28 and 30 (see FIG. 2). Also water tank 10
The inside is filled with cooling water 42 supplied from main water supply pipes 64 and 66. Furthermore, the roll 16,
Impellers 32, 3 having blade plates 40 between them 18
4 are provided with their axes parallel to the rolls 16, 18, and drive devices 52, 54 (see FIG. 3)
The cooling water 42 is rotated in the directions of arrows D and E to agitate the cooling water 42. 56,58
is for efficient stirring in the impeller cover box. The impeller cover plates 56 and 58 have an open portion at a portion facing the steel plate.

Further, as shown in FIG. 1, the rolls 16 and 18 are arranged in pairs at appropriate intervals, and as shown in FIG. has been done. The axes of these rolls 16 and 18 are horizontal, and are arranged in the lateral direction of the water tank 10, respectively. Further, one end of each roll 16, 18 protrudes to the outside of the water tank 10 through a bearing device 20, 22, and is connected to a drive device 28, 30 via a joint 24, 26 to be rotationally driven. The upper roll 16 and the lower roll 18 are rotated in opposite directions (directions of arrows A and B in FIG. It is now being sent to

In addition, outside the water storage tank 10 in FIG.
They are placed above and below 2. These water supply pipes 74
A slit nozzle 76 is connected to the slit nozzle 76, and pressure water 78 from the slit nozzle 76 is jetted toward the opening 11 to seal the opening 11 with water.

According to the steel plate continuous quenching apparatus configured in this way, efficient quenching can be performed stably, but the thickness of the steel plate to be quenched is limited to the size of the opening 11 or less. Also, when hardening a thin plate, the difficulty of sealing water in the opening 11 increases.

The present invention has been made in view of the above, and an object of the present invention is to further improve the device of the prior application and provide a continuous steel sheet hardening device that can efficiently harden steel sheets of various thicknesses. That is.

Therefore, the present invention divides the device of the prior application into upper and lower halves with the passing surface of the steel plate to be quenched as the border, and makes it possible to change the interval between the two divided bodies, and also makes it possible to extend and retract the joint between the two divided bodies. A sealing member is provided so that the size of the opening can be changed in accordance with the thickness of the steel plate to be cooled.

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

FIG. 4 is a cross-sectional configuration diagram of the apparatus according to the embodiment of the present invention, and corresponds to FIG. 2, which shows the cross section of the conventional apparatus.

In FIG. 4, the steel plate 12 to be hardened is
0' while being held between an upper roll 16 and a lower roll 18. Also, like the device of the prior application, impellers 32 and 34 (not shown) are installed between the rolls 16 and 18 at a predetermined interval so that their axes are parallel to the rolls 16 and 18. The cooling water in the water tank 10' is agitated by the rotation of the impellers 32 and 34, and the cooling water is rapidly quenched.

However, the water tank 10' of the continuous steel plate quenching equipment
is divided into upper and lower halves with the passing surface P of the steel plate to be hardened as the border, and the interval between the upper and lower divided tanks 10'a, 10'b can be changed by the lifting device 100, and the distance between the two is A sealing member 102 is disposed at. FIG. 5 is an enlarged view showing the structure of this seal member. As shown in FIG. 5, the seal member 102 includes a seal member main body 10 having a U-shaped cross section.
4, an upper plate 106 that holds the seal member main body 104, and a lower plate 108. This upper plate 106 is movable in the vertical direction, and is raised and lowered by the vertical movement of the support device 110. Further, an elastic material 11 is provided on the upper surface of the upper plate 106 for abutting against the bottom surface of the upper divided body 10'a of the water tank for sealing.
2 is fixed.

The sealing member main body 104 is made of an elastic material such as rubber, and the end portion is provided with a fixing means 1 such as a bolt.
14, the upper plate 106 and the lower plate 10
It is fixed to 8. Therefore, when the support device 110 rises, it deforms as shown by the two-dot chain line in FIG. 5, and is configured to perform a sealing action. Note that this support device 110 is equipped with an air cylinder 110a as shown in FIG.
It is driven by the cylinder 110a.

In the embodiment device configured as described above,
The distance between the divided bodies 10'a and 10'b can be adjusted by the lifting device 100 according to the thickness of the steel plate, and the sealing member 102 can be adjusted by the supporting device 110 to open the opening 11 of the water tank 10'. The size (thickness) can be adjusted while ensuring a water seal between the two divided bodies 10'a and 10'b. Furthermore, the installation area of the sealing member 102 is small enough, and the apparatus can be made compact.

In the device of this embodiment, a heated steel plate can be easily passed through even when the water storage tank 10' is not filled with water. When the high-temperature steel plate is passed through, the upper divided body 10a is first lifted as high as possible by the lifting device 100 so as not to be affected by the radiant heat of the high-temperature steel plate 12.
Further, the sealing member 102 is connected to the pneumatic cylinder 11.
0a pulls it down as far as possible.
Therefore, the sealing member 102 does not receive radiant heat from the high-temperature steel plate passing through the water storage tank 10', thereby preventing deterioration or burnout. Furthermore, in the apparatus of this embodiment, a side guide 116 can be provided inside each shaft support device for the purpose of preventing meandering of the treated steel plate, and thereby the seal member 102
It can also prevent heat radiation to.

Further, when such air passage of the high-temperature steel plate is not performed, a spring that constantly biases the upper plate 106 upward may be used in place of the air cylinder 110a.

In addition, in FIGS. 4 and 5, 120, 1
22 is a water supply pipe, 124 is a ceiling plate, 126 is a frame for suspending the upper divided body 10'a, and 128 is a bottom plate. Furthermore, the apparatus of this embodiment is provided with a water storage overflow means (not shown).

In the above embodiment, a sealing member 102 having a sealing member body 104 having a U-shaped cross section is used, but other sealing members can also be used in the present invention. An example of such a device is one in which a tube-like elastic body is disposed at the joint of the upper and lower divided bodies, and the tube-like elastic body expands and contracts in accordance with the interval between the joints to create a seal. .

As explained above, since the continuous steel plate hardening apparatus according to the present invention moves cooling water in the conveying direction of the steel plate or in the opposite direction, the conventionally used cooling nozzle is unnecessary and accidents caused by nozzle clogging can be eliminated. This eliminates the need to simultaneously cool the entire length of the steel plate, enabling efficient cooling and downsizing the quenching equipment.

Furthermore, in the present invention, the water tank is divided into upper and lower halves, and the size of the opening for inserting the steel plate can be changed, which has the excellent effect of being able to freely respond to changes in the wall thickness of the steel plate to be hardened. has.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the device of the prior application, FIG. 2 is a sectional view taken along the line of FIG. 1, FIG. 3 is a sectional view taken along the line of FIG. The sectional view, FIG. 5, is an enlarged view of the main part of FIG. 4. 10... Water tank, 10'a... Upper division body, 10'b
...Lower divided body, 16, 18...Roller, 32, 34
... Impeller, 56, 58 ... Impeller cover box, 100...
Lifting device, 102...Sealing member, 104...Sealing member main body, 106, 108...Plate, 110...
Support device, 110a...air cylinder.

Claims (1)

[Scope of Claims] 1. A water tank having an opening on the opposite wall for inserting the steel plate to be hardened, a roll disposed in the water tank for transporting the steel plate to be hardened, and An impeller disposed near a surface through which the steel plate to be quenched is arranged so that its axis is substantially parallel to the axis of the roll, and an impeller that surrounds the impeller and has an open portion facing the steel plate to be quenched. a cover box; a first drive device for rotating the impeller;
and a second drive device for rotating the rolls, the continuous steel sheet hardening device is divided into upper and lower halves with the passing surface of the steel sheet to be hardened as the border, and the interval between the two divided bodies is 1. A continuous steel plate quenching apparatus characterized in that: is changeable, and an expandable sealing member is provided at the joint between the two divided bodies. 2. The continuous steel plate quenching apparatus according to claim 1, wherein the sealing member is an elastic body having a U-shaped cross section, and a back portion thereof is oriented toward the outside of the water storage tank. 3. The continuous steel plate quenching apparatus according to claim 1 or 2, wherein the sealing member is provided with an expanding and contracting means for vertically expanding and contracting the sealing member.