JPH0213480Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a vertical continuous quenching device for continuously quenching columnar or cylindrical steel materials such as rolling rolls. It is constructed so that it can be attached and detached smoothly and safely.

[Prior Art] Heating and cooling steel can improve its mechanical properties.

For cylindrical or cylindrical steel materials such as rolling rolls, quenching is an essential process for improving hardness, bending strength, or fatigue strength.

By the way, in the vertical type, this kind of steel is stood vertically, local heating is performed while moving the steel material in the axial direction, and immediately after this local heating, a large amount of cooling water is jetted to the heated parts of the steel material to perform continuous quenching. Continuous quenching equipment (for example, JP-A-51-91816, JP-A-54
-119309 Publication), while the steel material is suspended and held by a hanging device of a crane for transporting steel materials, the suspended steel material is positioned on the lower support device of the quenching equipment, and the steel material is placed on the upper support device of the quenching equipment. By pressing and supporting the steel material from above, the steel material can be attached to the quenching device, and conversely, the steel material after quenching is supported by both the upper and lower support devices.
After suspending and holding the steel material using a hanging device, the pressing support action of the upper support device on the steel material is released, thereby achieving removal of the hardened steel material from the hardening device.

[Problem that the invention attempts to solve]

However, with the conventional equipment described above, interference between the upper support device of the quenching equipment and the crane hoist for transporting steel materials is a major problem when installing and removing steel materials from the quenching equipment. countermeasures were strongly desired.

As shown in FIGS. 12 and 13, the conventional hardening device has a pair of elevating screws 7 that are assembled to hang down from the upper ends of columns 8, 8 of the device main body 1.
A cylinder shaft 5 connects the lower support device 4 and the upper support device 3.
An induction heating coil 55 and a cooling nozzle 56 are installed directly below the heating coil 55 so as to be integrally movable up and down. The upper support device 3 has a structure in which a tailstock center 6 that directly applies a pressing force as a holding force to the steel material 2 is attached to the upper frame 5 so as to be movable up and down. I was getting used to it.

That is, in the conventional hardening apparatus, the structure for attaching and detaching the steel material 2 was simply such that the tailstock center 6 could be moved up and down.

For this reason, the steel material 2 is attached to the hoist 11 of the crane 10
When attempting to align the axis of the steel material 2 with the axes of both support devices 3 and 4 by placing the lower end of the steel material 2 on the lower support device 4, the suspension tool 11 and the upper support device 3 upper frame 5 or tailstock center 6
This could be extremely serious and dangerous, such as damaging the upper support device 3 due to contact with the upper support device 3 or causing the hanging tool 11 to come off from the support part of the steel material 2 before the steel material 2 is supported by both support devices 3 and 4. This poses a problem in that it takes a long time to attach and detach the steel material 2 to and from the quenching device, and it is also quite dangerous.

The present invention was devised to solve the problems and inconveniences in the conventional examples described above.
The purpose is to safely and efficiently attach and detach the quenching device to the quenching equipment.

[Means for solving problems]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vertical continuous quenching apparatus according to the present invention will be described below with reference to drawings showing an embodiment of the present invention.

In the present invention, an induction heating coil 55 is moved while vertically moving a columnar or cylindrical steel material 2 such as a rolling roll while supporting it at both its upper and lower ends.
The tailstock center 21 is a vertical continuous hardening device that heats the steel material 2 and sequentially cools the heated steel material 2, and directly presses the upper end of the steel material 2 to apply a holding force.
, an upper support device 20 is attached to a support frame 25 via a support frame 26 so as to be movable by horizontal rotation between a steel material holding position and a retracted position, and is movable up and down, and the lower end is supported by the lower support device 4. A pair of holding grips 34 and 35 are provided so as to be movable between a steel material holding position and a retracted position, which grip the body of the steel material 2 from the lateral direction and position the steel material 2 by this gripping. A temporary support device 30 is provided between the upper support device 20 and the lower support device 4.

The tailstock center 21 of the upper support device 20 is located at the sixth
As shown in FIG. 7 and FIG. 7, the lower tip is machined into a conical shape, and this tip is fitted into a centering fitting hole formed on the upper end surface of the steel material 2 (not shown). Accordingly, the steel material 2 is assembled and held in the quenching machine in a centered state.
A tailstock center 21 is installed between the holding case 22 and the holding case 22, which cannot be removed but can be moved up and down.
A spring 45 is fitted and assembled to exert downward elastic force on the.

Further, the support frame 26 is provided with both lifting screws 7, 7.
A pair of support frames 25, 25 respectively assembled to
It is assembled in an erected manner between them, and is connected to one of the support frames 25 so as to be pivotable in the horizontal direction using this support frame 25 as a fulcrum, so that it can be freely attached to and detached from the other support frame 25. It will be assembled into.

Furthermore, this upper support device 20 is assembled and fixed to the connecting cylinder shaft 50 by a support frame 25 that is assembled to the upper end portion of the connecting cylinder shaft 50 that is screwed and assembled to both the lifting screws 7 so as to be movable up and down. The lower support device 4 is assembled and fixed to the same connecting cylindrical shaft 50, and is moved up and down along the elevating screw 7 as the elevating screw 7 rotates.

The temporary support device 30 is assembled to the support column 8, which is an immovable part of the device main body 1, and holds the pair of holding grips 34 and 35 in a state in which the pair of holding grips 34 and 35 are completely synchronized from the horizontal and lateral directions with the imaginary central axis as the point of symmetry. The holding grips 34 and 35 are configured to move toward and away from each other at a steel holding position where the steel material 2 mounted on the lower support device 4 is correctly temporarily held at the steel material assembly position of the apparatus main body 1. and a retracted position where it does not interfere with the hardening operation of the steel material 2 held in the apparatus main body 1.

[Effect]

The vertical continuous quenching apparatus according to the present invention has the above-mentioned configuration, and the operation of attaching and detaching the steel material 2 is performed as follows.

First, mounting of the steel material 2 will be explained.

Before installing the steel material 2 to the device main body 1,
The support pedestal 26 is in the retracted position shown in double-dashed lines in FIG. 3, and the holding grips 34, 35 are
They are located at the retracted positions indicated by two-dot chain lines in FIG.

The steel material 2 is suspended by the hanging device 11 of the crane 10, and the steel material 2 is transported vertically from the steel material storage area to the equipment main body 1, and the axis of the steel material 2 is aligned with the center axis of the equipment main body 1. After that, the crane 10 is lowered to place the lower end of the steel material 2 on the lower support device 4.

Once the lower end of the steel material 2 has been placed on the lower support device 4, the temporary support device 30 is driven and first the holding grips 34, 35 are moved from the retracted position to the body of the steel material 2 from the horizontal direction. Move the holding grips 34, 35 to opposite positions, and then
are horizontally moved toward each other to sandwich the body of the steel material 2, and at the same time, the steel material 2 is correctly positioned relative to the apparatus body 1, thereby achieving temporary support of the steel material 2.

When the temporary support of the steel material 2 by the temporary support device 30 is achieved in this way, the hanging tool 11 is removed from the upper end of the steel material 2, and the support frame 2 of the upper support device 20 is removed.
6 is pivoted from the retracted position to the holding position, and the tailstock center 21 is positioned directly above the steel material 2.

Once the support frame 26, that is, the tailstock center 21 is located at the holding position, the entire upper support device 20 is moved downward to fit the tailstock center 21 to the upper end of the steel material 2, and the tailstock center 21 is moved to the upper end of the spring 45. The steel material 2 is attached to the main body 1 of the apparatus by pressing against the steel material 2 with a spring force.

Once the steel material 2 has been attached to the device body 1, both retaining grips 34 of the temporary support device 30,
35 is retracted to the retracted position, and a conventionally known continuous hardening process is performed on the steel material 2.

Removal of the hardened steel material 2 from the apparatus main body 1 is achieved by an operation opposite to the above-described operation for attaching the steel material 2 to the apparatus main body 1.

In this manner, the vertical continuous hardening apparatus according to the present invention can retract the tailstock center 21 of the upper support device 20 from the holding position, which is the position directly above the steel material 2 to be mounted, to the horizontally lateral retracted position. ,
At the initial stage of the installation work of the steel material 2 suspended by the crane 10 to the device body 1, this tailstock center 21 does not interfere with the installation work of the steel material 2 to the device main body 1 at all, and serves as a support for the lower part of the steel material 2. This means that the attachment work to the device 4 can be accomplished smoothly, favorably, and accurately.

Further, the steel material 2 mounted on the lower support device 4 is accurately positioned and temporarily supported by the temporary support device 30, and the steel material 2 is supported by the upper support device 20. Since the attachment to the main body 1 is completed, the temporary support device 3
When temporary support of the steel material 2 by the steel material 2 is achieved, the hanging tool 11 can be removed from the steel material 2, thereby completely eliminating interference between the hanging tool 11 and the upper support device 20.

Furthermore, the steel material 2 placed on the lower support device 4
Since the steel material 2 is in a vertical posture, the holding force of the temporary support device 30 to maintain the vertical posture of the steel material 2 does not need to be strong at all; can be safely and reliably supported, so even if the hanging tool 11 is removed from the upper end of the steel material 2, the steel material 2 placed on the lower support device 4 is completely supported by the upper support device 20. can be safely and reliably supported.

〔Example〕

In the illustrated embodiment, the upper support device 20 (hereinafter referred to as
In particular, Figures 1, 2, 3, 8, 9,
10 and 11), a support pedestal 26 with a tailstock center 21 attached thereto is installed in a suspended manner between both support frames 25 which are assembled to a connecting cylinder shaft 50 so as to be movable up and down. The support frame 25 is moved up and down relative to the connecting cylinder shaft 50 by means of screw jacks 23 and 24 provided between the supporting frame 25 and the connecting cylinder shaft 50.

The screw jacks 23 and 24 are driven by an elevating drive source 28 mounted on the support frame 25, and the assembly structure with respect to the support frame 25 is as follows.
Screwjackets 23 and 24 are different.

In the case of the screw jack 24 (hereinafter, see particularly FIGS. 8 and 9), the support pedestal 26 is assembled to the support frame 25 so as to be rotatably displaced, and a pivot axis for this rotary displacement is provided. A through-hole opening upward and downward is formed in a bracket that is integrally provided with the support frame 25 so as to protrude laterally, and the shaft cylinder 29 is inserted and assembled into this through-hole.
The screw shaft of the screw jack 24 is inserted and assembled into the inside of the shaft cylinder 29 through the bearing 60, and a large diameter bulging tip 24' is provided at the lower end of the screw shaft that projects downward from inside the shaft cylinder 29. 29
This prevents the screw shaft from coming out from within.

The support pedestal 26 forms an assembly hole into which the shaft cylinder 29 is fitted into a bracket protruding from its side end,
The shaft cylinder 29 is inserted into this assembly hole via the bush 59 to achieve rotatable assembly to the support frame 25.

On the other hand, in the case of Screwjyatsuki 23 (hereinafter,
10 and 11) is simply assembled to the support frame 25,
A through hole that is opened vertically in a bracket that is integrally provided with the support frame 25 so as to protrude laterally is connected to the coupling cylinder portion 25.
The screw shaft of the screw jack 23 is inserted and assembled into the joint cylinder part 25a through the bearing 60, and a large diameter screw shaft is provided at the lower end of the screw shaft that protrudes downward from inside the joint cylinder part 25a. A bulging tip 23' is provided to connect the connecting tube 25.
This prevents the screw shaft from coming out upward from inside a.

Support frame 26 on this screw jack 23 side
Since the end portion only needs to be removably attached to the support frame 25, the screw jack 23 should not interfere with the attachment to the support frame 25.
Notch 26a facing screw jack 23
In addition, in order to firmly maintain the attachment of the support frame 26 to the support frame 25 when the upper support device 20 supports the steel material 2, a support frame is formed at the end of the support frame 26. A locking hole 26b is formed into which a stopper 58 that is moved in and out by a cylinder 57 fixed to the cylinder 25 is fitted and engaged.

Further, the support frame 25 on the side where the screw jack 24 serving as the rotation axis of the support frame 26 is provided is provided with a drive device 27 (see FIG. 3) whose one end is connected to the support frame 26. The drive device 27 causes the support frame 26 to pivot in the horizontal direction using the screw shaft of the screw jack 24 as a rotation axis.
The tailstock center 21 is moved between the holding position and the retracted position.

The temporary support device 30 (see FIGS. 1, 4, and 5) includes a swing shaft that is rotated by a swing drive source 40 via support brackets 31 and 32 between both columns 8 of the device main body 1. 33 is assembled in a rotatable manner, and both holding grips 34 and 35 are attached to this swing shaft 33.
is assembled so as to be slidable in a laterally protruding position, and one of the holding grips 34 and 35 is rotatably supported on the swing shaft 33 by pivot brackets 36 and 37 at both ends. The screw rod 39 is rotatably driven by a rotary drive source 38 fixed to the swing shaft 33, and the screw rod 39 is screwed into a right-hand threaded portion formed separately on the left and right sides, and the other screwed into a left-hand threaded portion.

Therefore, by the operation of the swing drive source 40, both holding grips 34, 35 swing between the retracted position shown by the two-dot chain line in FIG. 5 and the holding position shown by the solid line. Therefore, the rotational drive source 38
Due to the operation of the holding grips 34, 35,
It approaches and moves away from the body of the steel material 2 from the side, thereby achieving temporary holding of the steel material 2 and its release.

In addition, if both holding grips 34 and 35 can be moved away from each other sufficiently to the side, that is, if the steel material 2
If it is possible to separate and retreat to such an extent that there is no risk of hindrance to attachment to the main body 1 of the device, there is no need to provide the swing drive source 40, and the sideward retreating position of both the holding grips 34 and 35 is not necessary. can be set as the retreat position.

Furthermore, although the illustrated embodiment of the device of the present invention has a configuration in which a cooling nozzle 56 is provided directly below the heating coil 55, the implementation of the present invention is not limited to a quenching device having such a configuration. For example, the present invention can be applied to a vertical continuous hardening apparatus in which the steel material 2 is directly immersed in a water tank after induction heating, or in which the steel material 2 is air cooled.

[Effect of idea]

As is clear from the above description, the vertical continuous quenching apparatus according to the present invention can easily, smoothly, reliably and safely attach and remove steel materials from the apparatus body, and Since the positioning operation is easy to perform, efficient work can be achieved, and furthermore, the handling is easy and simple, and many other excellent effects are exhibited.

[Brief explanation of drawings]

FIG. 1 is an overall front view showing an embodiment of the present invention. FIG. 2 is a partially enlarged cross-sectional view showing the elevating and lowering functional portion of the upper support device. FIG. 3 is a plan view taken along line A--A in FIG. 1 and showing the structure of the upper support device. FIG. 4 is a plan view taken along line BB in FIG. 1 and showing the configuration of the temporary support device. FIG. 5 is a partial side view taken along line C--C in FIG. 4 for explaining the operation of the holding grip. 6 and 7 show the structure of the tailstock center of the upper support device, with FIG. 6 showing it when it is not in operation and FIG. 7 showing it when it is in operation. Figures 8 to 11 show the assembly structure of the support frame to the support frame of the upper support device. Figure 8 is a vertical cross-sectional view of the support frame on the rotation axis side, and Figure 9 is the same. FIG. 10 is a plan cross-sectional view of the rotation axis side, and FIG. 10 is a vertical cross-sectional view of the other side of the support frame.
FIG. 11 shows a plan sectional view of the other side.
FIG. 12 is a front view showing a typical configuration of a conventional vertical continuous hardening device. FIG. 13 is an explanatory diagram showing a state in which a steel material is suspended by a hanging tool of a crane. Explanation of symbols, 1; Device body, 2; Steel material, 3, 2
0; Upper support device, 4; Lower support device, 7; Lifting screw, 8; Support column, 21; Tailstock center, 2
2; Holding case, 25; Support frame, 26; Support frame, 30; Temporary support device, 33; Swing shaft, 34, 3
5; Retaining grip; 39; Screw bolt.

Claims (1)

[Scope of utility model registration request] A vertical continuous quenching device that heats a columnar or cylindrical steel material 2 such as a rolling roll while moving it in the vertical direction while supporting it at both upper and lower ends with an induction heating coil 55, and sequentially cools the heated steel material 2. A tailstock center 21 that directly presses against the upper end of the steel material 2 to apply a holding force is mounted on a support frame 25 via a support frame 26 so as to be movable between a steel material holding position and a retracted position by horizontal rotation. The attached upper support device 20 is movable up and down, and the body portion of the steel material 2 whose lower end is supported by the lower support device 4 is held from the lateral direction, and by this holding, the steel material 2 is
a pair of holding grips 34,
A temporary support device 30, in which a member 35 is movably provided between a steel material holding position and a retracted position, is attached to the upper support device 2.
A vertical continuous quenching device characterized in that it is provided between 0 and a lower support device 4.