JPH09182958A - Device for automatically transporting molten metal ladle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the transportation of a ladle, to shorten a time and to efficiently execute a work by automating the work for transporting and fitting/ removing the ladle incorporating molten metal to a molten metal pouring machine, at the time of pouring the molten metal into a mold. SOLUTION: Firstly, a carriage 2 is shifted from a high speed traveling to a low speed traveling with a limit switch 7 of the molten metal pouring machine 11 at the A position and further, automatically stopped with a limit switch 8. Then, a slide shaft 5 is advanced by working a cylinder 6 and the tip part is inserted into a fitting tool 12 to fix the positions of the carriage 2 and the molten metal pouring machine 11. Successively, roller conveyors 9 and 10 of the carriage 2 and the molten metal pouring machine 11 are rotatively driven to shift the ladle 3 on the molten metal pouring machine 11. After shifting, the slide shaft 5 is retreated by working the cylinder 6 and the fixing of the carriage 2 and the molten metal pouring machine 11 is released, and the carriage 2 is transported to the right side and automatically stopped at the position of the molten metal pouring machine 11 at the B position as the same way and positioned and fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically transporting a ladle charged with a molten metal from a holding furnace to a pouring machine when pouring the molten metal into a mold in the production of castings. It relates to the device.

[0002]

2. Description of the Related Art In the production of cast products, the operation of injecting the molten metal into the mold has already been automated, but the operation of transporting the molten metal to the pouring machine is still manual. A typical example of the conventional device is shown in FIG. The molten metal such as melted cast iron is held at a constant temperature and housed in the holding furnace 1, and is tilted by a hydraulic cylinder or the like to transfer the molten metal into the ladle 3. Then, by the operation of the operator 31, the ladle 2 is hoisted by the hoist 32, and while walking along the monorail 33, the ladle 3 is electrically driven and conveyed to above the pouring machine 11, and the hoist 3 is moved.
2 was operated and the ladle 3 was aligned and placed at the specified position on the pouring machine 11.

The pouring machine 11 automatically tilts to form the ladle 3
The molten metal inside is poured into the mold 13. The mold 13 is running, and the pouring machine 11 is running along the mold running line while pouring the molten metal. The empty ladle 3 after the pouring is completed is lifted by the hoist 32 by the operation of the operator 31, is electrically driven along the monorail 33, and the operator 31 follows and conveys it to the position of the holding furnace 1. Repeat the above work.

The temperature of the molten metal is, for example, 155 in the case of cast iron.
It is 0 ° C, and the surface temperature of the ladle 3 accommodating this is 300
℃. When the ladle 3 is hung by the hoist 32, the wire is hung on the hanging ring of the ladle 3, and the wire is removed after being lowered onto the pouring machine 11, but these operations are performed manually by the operator 31.

Most of the conventional molten metal transfer work is manual work except for the vertical movement of the ladle 3 by the hoist 32 and the electric running by the monorail 33, and the worker follows the ladle 3 to move. Had to do. Since the ladle hung by the hoist 32 is oscillating and unstable, there is a risk of the operator being burned due to splashing of molten metal or sparks.
If the wire of the hoist 32 was broken, there was a danger of a serious accident. Further, since the ladle 3 has a high temperature, the work of attaching and detaching the wire to and from the hanging ring of the ladle 3 was dangerous in a high temperature environment. Further, in the conventional apparatus, when the molten metal needs to be weighed, only the weighing is manually performed, and the automatic weighing and the automatic recording are not performed.

[0006]

DISCLOSURE OF THE INVENTION The present invention, in the production of cast products, when pouring the molten metal into a mold, the operation of transferring the ladle charged with the molten metal from a holding furnace to a pouring machine and removing it By automating, it is intended to avoid dangerous work, stabilize ladle transport, and further shorten the time and improve work efficiency. In addition, the purpose is to perform automatic measurement and automatic recording of the molten metal as needed.

[0007]

SUMMARY OF THE INVENTION To achieve the above object, the present invention relates to a trolley on which a ladle is placed, a rail for traveling the trolley, a traveling mechanism of the trolley, and a stop for stopping the trolley at the position of the pouring machine. The positioning and fixing mechanism includes a mechanism, a positioning fixing mechanism for the trolley and the pouring machine, and a ladle transfer mechanism between the trolley and the pouring machine. The positioning and fixing mechanism includes a slide shaft, an axial slide mechanism for the shaft, and a fitting for the shaft. An automatic transfer device for a molten metal ladle, characterized in that the insertion side of the insertion tool is enlarged with a taper. And, if necessary, a ladle weight measuring device is incorporated in the trolley.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The device of the present invention will be described with reference to the examples of FIGS. As shown in FIG. 1, the holding furnace 1 and the pouring machine 11
A rail 4 is laid between the two, and the carriage 2 is electrically driven by a traveling mechanism (not shown). A ladle 3 is placed on the trolley 2, and a stop mechanism for automatically stopping at the position of the pouring machine 11, a positioning fixing mechanism for the trolley and the pouring machine, and the trolley 2
It has a ladle transfer mechanism between the pouring machine and the pouring machine 11. In addition,
In the example of FIG. 1, two pouring machines 11 are installed at the A position and the B position, respectively. The proper use of both pouring machines will be described later.

In this example, limit switches 7 and 8 are provided as a stopping mechanism for the carriage 2. The limit switch 7 shifts from high speed traveling to low speed traveling, and the limit switch 8 stops the traveling. The traveling electric motor of the trolley 2 uses an inverter motor, and can be accelerated and decelerated by continuously variable speed at the time of starting and stopping, and can convey the molten metal in the ladle 3 without scattering.

As a positioning and fixing mechanism for the trolley 2 and the pouring machine 11, in this example, a slide shaft 5 on the trolley 2 side, a cylinder 6 which is an axial sliding mechanism of the shaft 5, and a fitting tool on the pouring machine 11 side. 12 is provided, but the fitting 12 on the trolley 2 side,
The slide shaft 5 and the cylinder 6 may be provided on the pouring machine 11 side. After the carriage 2 is stopped, the slide shaft 5 is slid in the axial direction by the cylinder 6 and fitted into the fitting tool 12,
Position and fix.

When the details of the slide shaft 5 and the fitting tool 12 are shown, the insertion side of the fitting tool 12 is tapered 14 as in the example of FIG.
Has been expanded with. Therefore, even if the stop position of the carriage 2 is slightly deviated from the predetermined position, if the slide shaft 5 is within the entrance range of the fitting 12, it can be fitted and positioned and fixed. In the example of FIG. 2, a roller 15 is provided at the tip of the slide shaft 5 to facilitate fitting. Reference numeral 23 is a holder for the slide shaft 5. Then, the interlock is electrically provided so that the carriage 2 and the pouring machine 11 do not move relative to each other. Therefore, when the ladle 3 is moved to the pouring machine 11, it can be stably moved on the roller conveyor.

As a ladle transfer mechanism between the carriage 2 and the pouring machine 11, a roller conveyor 9 is provided on the carriage 2 and a roller conveyor 10 is provided on the pouring machine 11. Double roller conveyor 9
And 10 are arranged on the same plane as shown in FIG. Then, the motor 16 on the carriage 2 and the motor 17 on the pouring machine 11 are simultaneously rotated to transfer the ladle 3. At this time, both roller conveyors 9 and 10 may be connected and rotated simultaneously by one motor 16 or 17. The forward movement of the ladle 3 is stopped by the limit switch 19, and the backward movement thereof is stopped by the limit switch 18.

When it is necessary to measure the weight of the molten metal in the ladle 3 when using the apparatus of the present invention, as shown in FIG. 4, the load cell 20, between the carriage 2 and the roller conveyor 9,
21 is provided, the weight is automatically measured, the weight is displayed on the display 22, and the weight is recorded, which can be used as management data such as the number of castings, the time, and the amount of molten metal used.

After the ladle 3 is transferred to the position of the pouring machine 11 by the device of the present invention and the molten metal in the ladle 3 is completely poured into the mold 13, the empty ladle 3 is moved by the mechanism shown in FIG. It is transferred to a dolly 2 and conveyed on a rail 4 to the position of the holding furnace 1 as shown in FIG. For this reason, two pouring machines 11 are provided, and the ladle 3 containing the molten metal is placed in the pouring machine 11 at the position A.
It is effective to repeat the operation of transferring the empty ladle 3 on the other pouring machine 11 at the position B to the trolley 2 and transferring it to the position of the holding furnace 1 after the transfer. And trolley 2
Regarding the traveling of, if the operator first indicates which of the pouring machine 11, A or B, to transfer the ladle 3 at the start of work,
After that, the ladle 2 containing the molten metal can be automatically transferred alternately to the both pouring machines 11.

[0015]

EXAMPLES With the apparatus of the present invention shown in FIGS. 1 to 4, molten cast iron at 1550 ° C. charged in a holding furnace 1 was transferred to a ladle 3 on a truck 2, and the truck 2 was automatically run. 10-18
It was conveyed to the position of the pouring machine 11 which was separated by m, automatically stopped, and the ladle 3 was transferred onto the pouring machine 11. Then, it was poured into the mold 13. A large number of molds 13 are lined up as shown in FIG. 1 and moved to the left every 30 seconds. In FIG. 1, the pouring machine 11 at the A position has no ladle, and the ladle 3 placed on the pouring machine 11 at the B position injects the molten metal into the mold 13 that is sent next. . When the pouring of one mold 13 is not completed within 30 seconds, the pouring machine 11 at the B position is pouring while moving along with it.

The trolley 2 was first switched from high-speed running to low-speed running by the limit switch 7 of the pouring machine 11 at the A position, and was automatically stopped by the limit switch 8. Then, the slide shaft 5 moves forward by the operation of the cylinder 6, and the tip end of the fitting tool 1
The trolley 2 and the pouring machine 11 were fixed in position. Next, the trolley 2 and the roller conveyors 9 and 10 of the pouring machine 11 were rotationally driven, and the ladle 3 was transferred onto the pouring machine 11. The transfer time was about 10 seconds.

After the transfer, the slide shaft 5 is retracted by the operation of the cylinder 6, the trolley 2 and the pouring machine 11 are released from the fixed state, the trolley 2 travels to the right, and the pouring machine 11 is in the B position. Similarly, it stopped automatically and was similarly fixed in position. The time during this period was about 10 seconds. Then, the empty ladle 3 for which pouring was completed was transferred onto the trolley 2 in about 10 seconds. afterwards,
The trolley 2 travels to the left, is transported to the position of the holding furnace 1,
The molten metal is received in the ladle 3, and the pouring machine 1 is also in the B position in the same manner.
The ladle 3 was transferred to No. 1, the empty ladle 3 on the pouring machine 11 at the A position was received, and this operation was repeated.

In this step, the operator's operation related to the ladle transportation is only the cart traveling instruction at the time of starting the operation, and the dangerous work as in the past is avoided. Further, since the ladle 3 is transported by being placed on the trolley 2 traveling on the rail 4, there is no risk of the molten metal being scattered due to shaking, and the transportation time is shortened. In addition, the transfer of the ladle 3 between the trolley 2 and the pouring machine 11 was completed in about 10 seconds, which was shorter than the case where the ladle was attached to and detached from the hoist by the conventional manual work. In addition, automatic control of ladle weight made it easy to collect process control data.

[0019]

EFFECTS OF THE INVENTION In the production of castings by the apparatus of the present invention, when pouring molten metal into a mold, the ladle loaded with the molten metal is transferred from a holding furnace or the like to a pouring machine and is attached and detached automatically. As a result, dangerous work by the operator can be avoided, the ladle transportation is stabilized, and the work efficiency can be improved by further shortening the time. In addition, the process control is facilitated by automatically measuring and recording the molten metal as necessary.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a device of the present invention.

FIG. 2 is a plan view showing an example of a positioning and fixing mechanism in the device of the present invention.

FIG. 3 is a side view showing an example of a ladle transfer mechanism in the device of the present invention.

FIG. 4 is a side view showing an example of a molten metal weighing machine in the device of the present invention.

FIG. 5 is a side view showing an example of a conventional device.

[Explanation of Codes] 1 ... Holding furnace 2 ... Truck 3 ... Ladle 4 ... Rail 5 ... Slide shaft 6 ... Cylinder 7, 8 ... Limit switch 9, 10 ... Roller conveyor 11 ... Pouring machine 12 ... Fitting tool 13 ... Mold 14 ... Taper 15 ... Roller 16, 17 ... Motor 18, 19 ... Limit switch 20, 21 ... Load cell 22 ... Indicator 23 ... Holder 31 ... Worker 32 ... Hoist 33 ... Monorail

Claims (2)

[Claims] 1. A trolley on which a ladle is placed, a rail for traveling the trolley, a traveling mechanism of the trolley, a stop mechanism for stopping the trolley at the position of the pouring machine, a positioning fixing mechanism for the trolley and the pouring machine, a trolley and pouring The positioning and fixing mechanism comprises a slide shaft, an axial slide mechanism for the shaft, and a fitting tool for the shaft. The fitting side of the fitting tool is tapered and enlarged. Automatic transfer device for molten metal ladle. 2. The automatic carrier for a molten metal ladle according to claim 1, wherein a weight measuring device for the ladle is incorporated in the carrier.