JPS58100636A - Continuous hardening device for steel plate - Google Patents

Abstract

PURPOSE:To provide a continuous hardening device for steel plates of water storage tank type which can harden steel plates of various wall thicknesses efficiently, by providing expandable sealing members in the joining parts of upper and lower divided bodies of a water storage tank bordering at the plane where the steel plate to be hardened travels, and making the size of the openings of the water storage tank changeable in accordance with the thickness of the steel plate to be hardened. CONSTITUTION:A water storage tank 10' of the above-descrived hardening device is divided to upper and lower parts by bordering at the plane P where the steel plate to be hardened travels. The spacing between the upper and lower divided bodies 10'a and 10'b is made changeable with a vertically moving device 100. Sealing members 102 are disposed between both. Each of the members 102 is constituted of a sealing member body 104 having a U shape in section, and upper, lower plates 106, 108 which sandwich the same and are respectively movable upward and downward. With the above-mentioned constitution, the spacing between the bodies 10'a and 10'b can be adjusted according to the thickness of the steel plate 12. The steel 12 to be passed through the tank 10' is passed through the openings formed in the opposed walls of the tank 10' by upper, lower rolls 16, 18 and is cooled and hardened by receiving the high water-cooling effect by the revolution of plural impellers disposed in the tank 10'.

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 the hardening 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 method has been adopted in which pressurized cooling water is injected from a nozzle to collide with the surface of the steel plate.

However, when this cooling means is used, the equipment for making the cooling water high-pressure is large-sized, and the cooling water usage basket becomes enormous, so that the quenching equipment is expensive and the operating cost increases. Furthermore, as the water supply piping becomes thicker and rounded, the space occupied by the piping increases, and the height and length of the quenching equipment need to be increased.In addition, the weight of the piping and its internal parts increases, making it necessary to reinforce the frame, etc. There is a need to.

In addition to this, the pitch between the parallel pipes becomes large, making it difficult to increase the jet water flow density, and the cooling capacity must be reduced. Further, clogging of the cooling water nozzle causes non-uniform quenching, which has the disadvantage of increasing time and cost for repairing clogged paper.

In order to solve these five problems, the present inventors have already invented and filed an application for a "continuous steel sheet hardening apparatus."

(%AN 1982-167102, 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 the configuration diagrams of the earlier application, in which Figure 1 is a side sectional view, and Figures 2 and 3 are respectively from ■-■ in Figure 1.
A cross-sectional view taken along the line rn-rn;

In FIG. 1, 10 is a water storage tank, and an opening 11 for inserting a steel plate 12 to be hardened is provided on the opposite side thereof.

Moreover, rolls 1618 are provided inside for holding the steel plate 12 from above and below and conveying it in the direction of arrow C. This roll 16.1g is rotationally driven in the directions of arrows A and B by a drive device 28.30 (see FIG. 2). Further, the water storage tank IO is filled with cooling water 42 supplied from the main water supply pipe 64.116. Furthermore;=the roll 16.18
1: An impeller 32.34 with a blade plate 40 is installed with its axis parallel to the roll 16.1B, and is driven in the direction of arrow l by a drive device 52.54 (see FIG. 3). The cooling water 42 is rotated to agitate the cooling water 42. 56.5g is for efficient stirring in the impeller cover box.

The impeller cover boxes 56, 5B have an open portion facing the steel plate.

Further, as shown in FIG. 1, the roll 16.1g is
A plurality of pairs are arranged at appropriate intervals, and a second
As shown in the figure, both ends thereof are each provided with a bearing device 20.
．． ! ! It is pivoted by. These roles 1@, f
The axes of the ils are horizontal, and each water tank is 1G.
It is arranged in the short direction. Furthermore, each rule 16.1
One end of g passes through the bearing device 20.22, and the outer rotation direction of the water tank 10 is such that the upper roll 16 and the lower roll 18 are respectively opposite directions (direction of arrow M, B in FIG. 1). A steel plate 12 is held between both rolls and conveyed in the longitudinal direction of the water tank IO.

19. Outside the water tank 10 in FIG. 1, water supply pipes 74 are arranged above and below the steel plate 12, facing the opening 11 which is the entrance and exit of the steel plate. A slit nozzle 76 is connected to these water supply pipes γ41;, and the pressure water 7B from the slit nozzle 76 is jetted toward the opening 11 to seal the opening 11 with water.

According to the round steel plate continuous quenching apparatus configured in this way, efficient quenching can be performed stably! .

(The difficulty of water sealing in the second case increases.

The present invention has been made in view of the above points, and an object of the present invention is to provide a continuous steel plate hardening apparatus which is further modified from the apparatus of the prior application and is capable of efficiently hardening steel plates of various wall thicknesses. The purpose is to

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.

The present invention will be described in detail below with reference to the drawings.

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

In FIG. 4, the steel plate 12 to be hardened is moved in a water storage tank 10' while being held between an upper roll 16 and a lower roll 18. Similarly to the device of the prior application, there is an axial flow between the rolls 1g and 1g at a predetermined interval! ! *! -Le 16, I
Impellers 32, 34 (not shown) are installed parallel to ll, and the rotation of these impellers 32, 34 agitates the cooling water in the water tank 10' and rapidly performs the quenching process. It is configured so that

However, the water storage tank 10'li of the continuous steel plate hardening equipment is divided into upper and lower halves with the steel plate passing surface P as the boundary, and the interval between the upper and lower divided tanks 1G'a, 10't) is determined by the vertical movement. It can be changed by the device 100, and a sealing member 102 is disposed between the two. Figure S is an enlarged view showing the structure of this seal member.
As shown in the figure, sealing member lO! is a sealing member main body 104 having a U-shaped cross section.

Upper plate 10 that holds this sealing member main body 104 @
, and a lower plate 108. The upper play 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 112 is fixed to the upper surface of this upper play 1.06 for abutting against the bottom surface of the water tank upper divided body 10'a for sealing.

The seal member main body 104 is made of an elastic material such as rubber, and its ends are fixed to the upper plate 106 and the lower plate 10g by fixing means 114 such as bolts.

Therefore, when the support device 110 rises, 2 in FIG.
It is configured to deform as shown by the dotted chain line and perform a sealing action. Note that this support device 11G is equipped with an air cylinder 110 & as shown in FIG.
It is driven by the cough cylinder 1101-.

In the embodiment device made of Tonoyo 5Et11, the divided body 1 G' is moved by the lifting device 100 according to the thickness of the steel plate.
! L, 10'b can be adjusted, and the support device 110 can adjust the sealing member 102 to adjust the size and thickness of the opening 11 of the water tank 10'.
This can be done while ensuring a water seal between the two divided bodies 10/a and 10b. Furthermore, the installation area of the viewing member 102 is small, making it easy to install and install.
・□The installation can be made compact.

In this embodiment, the heated steel plate can be passed through the container even when the water storage tank 10 is not completely filled with water. When passing this high-temperature steel plate, first, the upper divided body 10fL is lifted as high as possible by the lifting device 10G so as not to be affected by the radiant heat from the high-i plate opening. The seal member 102 is connected to the pneumatic cylinder 11.
By 0a, it is pulled down to the lowest possible second. The sealing member 102 does not receive radiant heat from the high-temperature steel plate passing through the water tank 10, thereby preventing deterioration or burnout. Furthermore, in the apparatus of this embodiment, a nide guide 116 can be provided inside each shaft support device for the purpose of preventing meandering of the treated steel plate, thereby also preventing heat radiation to the seal member 102.

Also, if such high-temperature steel plates are not air-circulated (−
The upper plate 1 is used instead of the air cylinder 110a.
It is also possible to employ a spring that always urges 06 upward.

In addition, in FIGS. 4 and 5, 120° 122 is a water supply pipe, 124 is a ceiling plate, and 126 is an upper divided body 10'1.
The suspension frame 128 is IjEIj. Furthermore, in the present embodiment, in the above embodiment in which a water storage order flow means (not shown) is provided, the cross section U
Seal member 102 having a letter-shaped seal member body 104
is used, however, other sealing members may be used in the present invention. As such, for example, a body is disposed in a tube-like elastic body at the junction of the upper and lower divided bodies, and the isthmus tube-shaped elastic body is expanded in accordance with the interval between the joints.
One example is one that shrinks and seals.

As explained above, since the continuous steel plate quenching apparatus according to the present invention moves the cooling water in the direction opposite to the conveying direction or expansion of the steel plate, accidents caused by clogging of the nozzle may occur, unlike conventionally used cooling nozzles. This eliminates the need to simultaneously cool the entire length of the steel plate, allowing efficient cooling and downsizing the quenching equipment.

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

[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 I-- in Fig. 1, Fig. 3 is a sectional view taken along the line I- in Fig. 1, and Fig. 4 is a sectional view taken along the line I-- in Fig. 1. FIG. S is an enlarged view of the main part of FIG. 4. 10... Water tank, 10IL... Upper divided body, IQtl... Lower divided body, 16.1g... Roller, 32.34... Impeller, 56.58... Impeller cover Box, 100... Lifting device, 102... Seal member,
104... Seal member main body, 108, 10 B-... Grate, 11G... Support device, 110 Tortoise... Air cylinder. Agent Tatsuyuki Unuma (and 2 others)

Claims (1)

[Scope of Claims] (!) A water storage tank having an opening on the opposite wall for insertion of a steel plate to be hardened, a roll disposed in the water tank for transporting a steel plate to be hardened, and a water storage tank. Near the passing surface of the hardened steel plate C:
a nine-impeller arranged so that its axis is substantially parallel to the axis of the above-mentioned size roll; an impeller cover box surrounding the impeller and having an open portion facing the steel plate to be hardened; , a continuous steel plate quenching apparatus comprising a first drive device for rotating the cough impeller and a second drive device for rotating the roll, the continuous steel plate quenching device having a passing surface of the steel plate to be quenched. Continuously quenched steel sheet, characterized in that it is divided into upper and lower halves with the boundary between the two halves, the interval between the two halves can be changed, and an expandable seal member is provided at the joint of the halves. Device. (!l) 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 the back portion thereof is oriented toward the outside of the water tank. (3) The continuous steel plate quenching apparatus according to claim 1 or 2, wherein the sealing member is provided with an expansion and contraction means for vertically expanding and contracting the sealing member. .