JPS599603B2 - Bar-shaped material quenching equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an apparatus for cooling a bar by changing the injection angle of an external cooling nozzle to determine the optimal cooling conditions for a full-sized bar.

Immersion cooling of a red-hot rod in a stationary liquid relies on natural convection of the cooling liquid, so the cooling capacity is small, and it is not possible to achieve the cooling rate necessary for hardening, except for thin-walled items such as pipes. First, it is difficult to obtain a sufficient hardened structure.

For this reason, measures are taken to increase the cooling capacity by forcibly stirring the cooling liquid and causing forced convection.

Stirring of the coolant is usually performed by a coolant injection nozzle.

For example, in the case of a pipe, in order to obtain a good shape after cooling and a uniform and sufficiently hardened structure, it is necessary to carry out the hardening operation at a cooling limit determined by the material and size of the pipe and the cooling liquid.

To obtain a cooling capacity close to the limit cooling, as soon as the red-hot pipe is immersed in the cooling liquid, strong forced convection is used to quickly escape the film boiling region where cooling is unstable and low heat transfer, resulting in nucleate boiling where high heat transfer is obtained. A method is known in which the pipe surface temperature is rapidly lowered so that the

For this reason, the pipe immersion cooling device has a structure in which an outer surface cooling nozzle for stirring the cooling liquid on the outer surface of the pipe is disposed toward the circumferential direction of the pipe.

In a cooling system for the same pipe size, the outer surface cooling nozzle can be fixedly arranged to be optimal for cooling that pipe size, but in a multi-sized pipe cooling system, nozzles can be arranged in a fixed manner in the circumferential direction of the pipe so that it can be applied from the smallest size to the largest size. Many nozzles are arranged to achieve uniform cooling of each size, and in order to obtain a good pipe shape after cooling, we thin out the nozzles that correspond to the cooling size from among the arranged nozzles. .

However, although it is possible to arrange a very large number of nozzles and to configure the nozzle configuration suitable for each size, the number of nozzles that can be arranged is naturally limited due to the installation space of the nozzles.

Cooling of each pipe size is performed by varying the water pressure and water volume with a limited nozzle, but it is impossible to obtain optimal cooling conditions over the entire size, which causes uneven and insufficient cooling. This may result in poor cooling or a poor shape after cooling.

Further, since the number of nozzles increases and the nozzles must be combined, the structure becomes complicated, and troubles tend to occur, making the cooling device difficult to use.

The present invention solves the above-mentioned problems and relates to a pipe cooling device in which compatible nozzles are arranged corresponding to the size of the bar material.

The spray direction and position of the nozzles arranged in the circumferential direction of the rod-shaped material are changed, and the water volume and water pressure are adjusted to cause agitation of the cooling liquid applied to each pipe size.

This makes it possible to obtain optimal cooling conditions for the full size with a small number of nozzles.

Since the number of nozzles is small, troubles due to knots and the like are less likely to occur, and it is also possible to replace the nozzle tips using the roll change time that accompanies size change.

It goes without saying that the range of change in the injection position can be made smaller by replacing the nozzle tip.

An embodiment of the apparatus of the present invention will be explained below with reference to the drawings.

FIG. 1 is a plan view of the device of the present invention, and FIG. 2 is a front view of the same. In the figures, 1 indicates a bar-shaped material, and in this embodiment, a pipe (hereinafter, the bar-shaped material is an example of a pipe), and 2 indicates a pipe. The pipe mounting skid 3 is a liquid tank, for example, an aqueous tank filled with water, and the pipe mounting skids 2 are provided within the liquid tank 3 at appropriate intervals.

In this case, the pipe mounting skid 2 is provided integrally with the conveying skid, but it may be provided separately.

Reference numeral 6 denotes a transfer device installed in a direction opposite to the pipe mounting skid 2; 7 a transfer rear table;
The pipe 1 is rotated around the center to feed the pipe 1 to the rear table 7.

Reference numeral 14 indicates a long liquid pipe provided in the direction in which the pipe mounting skids 2 are arranged side by side, and this liquid pipe 14 is connected to a liquid source (not shown) and is rotatably arranged.

Reference numerals 4 and 5 indicate nozzles that are provided at appropriate pitches in the longitudinal direction of the liquid pipe 14, facing toward the pipe mounting skid 2.

Reference numerals 13, 13', and 13'' indicate angle changing levers, and the angle changing levers 13, 13', and 13'' are each rotatably mounted and connected to a drive source such as an electric motor 11 or a speed reducer 12.
With the driving force of
is rotated to change the spray angle of the nozzles 4 and 5.

According to the present invention, the height positions of the nozzles 4 and 5 can be changed in accordance with the change in angle, and good results have been obtained.

That is, in the figure, 10 is a truck, 8 is a guide device, 9 is a truck moving lever, 15 is an electric motor, and 16 is a reducer. The truck moving lever 9 is rotatably connected to the electric motor 15 and the reducer 16. ing.

The electric motor 11, speed reducer 12, angle change levers 13, 13', 13'', nozzle liquid pipe 14, and nozzles 4, 5 are arranged on the truck 10, and the rotation of the truck moving lever 9 The height positions of the nozzles 4 and 5 are changed by.

Of course, in this case, it is also possible to change only the injection angles of the nozzles 4 and 5 by changing the height of the pipe 1 without changing the heights of the nozzles 4 and 5.

1.7 is a shock absorber for preventing the pipe 1 from colliding with the pipe mounting skid 2.

An example of the operation of the present invention will be described below.

In the plan view of FIG. 1 and the side view of FIG. 2, a red-hot pipe 1 is rolled on a pipe mounting skid 2 and inserted into a liquid tank 3.

The pipe is cooled by nozzles 4 and 5 arranged opposite to the pipe, and after cooling is completed, the pipe is sent to the rear table 7 by a transfer device 6.

If the body of pipe '1 changes, the electric motor 15 and reducer 16
The carriage moving lever 9 is rotated by the drive of the carriage 10.
is moved along the guide device 8.

Therefore, as the trolley 10 moves, the electric motor 11, deceleration 12, and angle changing levers 13 and 13 disposed on the trolley 10 are moved.
', 13〃, change the height position of the liquid pipe 14 and the nozzles 4, 5.

Further, the electric motor 11 and the speed reducer 12 are driven at the same time as this movement or after the movement, and the angle change lever 13 is rotated, so that the angle change levers 13' and 13'' are activated in this order, and the nozzle liquid pipe 14 is rotated to rotate the nozzle liquid pipe 14. This changes the injection angle of the jet.

As described above, with the apparatus of the present invention, optimum cooling conditions can be obtained over the entire size, and extremely remarkable effects can be achieved in the quality of the shape of the pipe 1 after cooling. Its effects are remarkable, such as eliminating the drawbacks and simplifying the structure.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a plan view of the present invention, and FIG. 2 is a front view of the same. 1 is a rod-shaped material (pipe), 2 is a pipe mounting skid, 3 is a liquid tank, 4 and 5 are nozzles, 6 is a transfer device, 7 is a conveyance rear table, 8 is a guide device, 9 is a trolley moving lever, 10 is a Trolley, 11.15 is electric motor, 12.16 is reducer, 13
．． 13', 13'' are angle change levers, 14 is a liquid pipe,
17 is a shock absorber.

Claims (1)

[Claims] 1 A plurality of rod-shaped material mounting skids are arranged in a liquid tank at appropriate intervals, and a transfer device is installed in a direction opposite to the skids, and nozzles are installed at appropriate pitches in long liquid pipes installed in the direction in which the skids are arranged side by side. 1. A cooling device for a rod-shaped material, characterized in that the liquid tube is connected to an angle changing lever connected to a drive source, and the liquid tube is rotated by movement of the lever to change the spray angle of the nozzle.