JPS597473A - Pouring method - Google Patents

Abstract

PURPOSE:To supply molten metal into each casting mold at an adequate tapping rate without adjusting a timer relay, by detecting the tapping from a ladle, tilting the ladle with the timer relay, detecting the change in the casting mold during receiving of the molten metal and resetting the ladle. CONSTITUTION:When the molten metal is tapped from the tap holes 34, 35 of a ladle 32, the tapping is detected with a detection sensor S1 which actuates a timer relay to tilt the ladle 32 for a set time then stops the tilting and continues the tapping. When the opening in the flow-off part 56 of a casting mold 12 rises, the 1st detection sensor S2 for the flow-off detects the same and emits a command for completion of the pouring to move a fluid pressure cylinder 44 upward, thereby resetting the ladle 32 and stopping the tapping. If the 2nd sensor S2 detects the flow-off of the other casting mold 13 before the 1st sensor S2 detects the flow off of one mold 12, the output thereof may be used as a command for completing the casting.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for pouring into a ladle in casting.

[Technical background of the invention]

Conventionally, hot water was dispensed from the ladle's tap, and the operation of the ladle was controlled only by a timer relay, etc. If the flow rate of melted metal changes due to such reasons, the timer relay must be adjusted each time so that the flow rate of melted metal for each mold becomes equal.

[Problems with background technology]

However, with the traditional method of adjusting the timer relay,
A monitor is required, errors may occur depending on the person making the adjustment,
Further, minute adjustment is difficult.

[Purpose of the invention]

The present invention was developed in view of these points, and it is possible to supply an appropriate amount of molten metal to each mold without adjusting the timer relay even if the ladle or C1 molten metal flow rate changes. This is what we are trying to do.

[Summary of the invention]

The configuration of the first invention is to detect hot water being dispensed from the ladle, activate a timer relay to tilt the ladle for a set time, and then stop the tilting of the ladle to continue dispensing hot water. This invention relates to a pouring method characterized in that, by detecting a change in the mold during the pouring process, the completion of pouring is commanded, the ladle is driven in the return direction, and pouring is stopped.

In addition, the configuration of the second invention of Fang is that by detecting hot water coming out of the ladle, a timer relay is activated to tilt the ladle for a set time. stop tilting and continue dispensing hot water,
After that, the ladle is driven in the return direction for the time set by the timer relay, and then the return of the ladle is stopped to reduce the flow rate of tapping, and the completion of tapping is determined by detecting changes in the mold during receiving. The present invention relates to a pouring method characterized in that the ladle is driven in the return direction upon command and the pouring of hot water is stopped.

[Example of development]

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in the drawings.

As shown in Fig. 1, the mold conveyance line (1) is arranged in a rectangular shape when viewed from above, and the core housing section (2)
), pouring section (3), mold reversing section (4) for removing objects that obstruct weir folding, sprue folding section (5), lift folding section (6), cutting section (7), and mold Cooling or heating section (8
) are arranged sequentially. In addition, each mold transport plate (1 m
)K has two molds Q21 and Q3 fixed.

Next, as shown in Figure 2, in the pouring section (3), a swing frame @ is fixed to the swing support column Qυ, a support frame (C) is fixed to this swing frame 4, and this support frame @ The right ladle support (goods) is removably attached to it.

In addition, the main body of the electric motor (to) which can control the amount of rotation is fixed to the above-mentioned swing column (01) via the frame frame, and the screw shaft (5) connected to the rotation axis of this motor is attached to the vertical movement frame (to). ), and the left ladle support is removably attached to the bottom of this vertically movable frame, and the left and right ladle supports (
The ladle 03, which has a fan-shaped vertical cross section, is rotatably supported by a spherical bearing 6υ provided on the lower side of the kiln. do. - The above-mentioned ladle 0) is provided with two tap holes (2), and a gas burner (not shown) is set from these tap holes (2) to the hot water surface in the ladle 0). ing. In addition, the above-mentioned revolving frame @ is used to rotate the mold conveyance line (
It rotates to escape to the outside of 1), but it is fixed in the state shown in Figure 2 when hot water is tapped.

In addition, in Fig. 2, a fan-shaped tilting plate 0υ similar to the longitudinal section of the ladle 02 is arranged on the right side of the ladle 03, and a bearing (47J) provided on the right side of the support frame A shaft 03 of 4υ is rotatably supported. This shaft (c) is provided concentrically and separately from the tilting support shaft (c) on the left side of the ladle country. Also, the lower right side of the rotating frame (23) The tip of the piston rod (451) of the fluid pressure cylinder circle (4
6), and connect the base end -η of the main body of this fluid pressure cylinder (corporate) to the lower end (4) of the fan-shaped tilting base wall by a chain 4. This chain 4 is connected to a rotating frame Q
It is wrapped around the sprocket wheel 6G rotatably supported on the upper right side of the ladle 04, and also wrapped around the arcuate surface all of the fan-shaped tilting plate (411). A mating convex portion Q is provided protrudingly provided, and an engaging piece 5z is protruded from the tilting plate (411) toward the ladle side, and the engaging piece (52) is engaged with the lower side of the engaging convex portion 531.

Then, when replacing the above-mentioned ladle c.

Rotate the pivot support Qυ to open the pivot frame (2) to the outside of the mold conveyance line (1), and connect the ladle supports (24 (2!l) on both sides to the support frame [ ] and the vertical movement frame (c), and leave the tilting plate Cυ on the support frame (to).

Next, as shown in Figure 8 (α), eight detection sensors (S, ) (S, X8.) are provided. This detection sensor (
S, ) (82) and (81) detect the light of the molten metal at the light receiving part using, for example, a radiation pyrometer (photo sensor).

The hot water detection sensor (S) is mounted on a support stand (not shown) facing the left tap hole of one of the ladle c.

In addition, the fried water detection sensors (828S) of Fang 1 and Fang 2 are connected to the two molds (121u) on the mold conveying plate (11).
They are respectively provided toward the opening of the raised part @5η of ni. In addition, each mold (121 (131) has two lifting parts (a) 5η force t, but the above sensors (S,) (S,) each have a lifting part (a) on the left (Ill) of 5η force t. This is the sprue part where the molten metal is poured.

Next, as shown in Figure 8 (α), tilt the spout of the ladle 03 downward and pour the metal into the sprue of the mold (121 (13). , the main body of the fluid pressure cylinder 040 is lowered by the fluid pressure with respect to the piston rod (45) in the fixed position, and the tilting plate Cυ is rotated upward through the chain 2 (4I), and the engagement piece 6z of the tilting plate circle is rotated upward. Push up the engaging protrusions of the ladle (32) and press the two tap holes of the ladle (
property) Tilt the rice field downward. Note that the sprue side force) et al.
The molten metal injected into the inside of a'a (131
When 3 is full, it will be filled at the end at the lift section @r5.

In addition, as shown in Figure 3 (4), the ladle 04-2
When adjusting the balance of each tap, for example, if the amount of molten metal flowing out from the right tap is too large as shown in Figure 8 (Q), drive the electric motor (4). to rotate the screw shaft surface and lower the vertical movement frame (to) screwed onto this screw shaft (2), and this vertical movement frame t2J! The left side of the ladle t3 supported by JK is lowered by a predetermined amount to make the amount of molten metal flowing out from the left and right tap ports G41 and C351 the same.

Next, as shown in Figure 4, a control system is provided to control the tilting of the ladle and the balance of the two tap holes 39.

That is, the fluid pressure cylinder 1 is supplied from a fluid pressure source (not shown).
A check valve (C) and a variable restrictor type flow regulating valve (Fig. ), a pinion shaft is connected to the adjustment rotation shaft of the flow rate adjustment valve (2), and this pinion shaft g37
) is engaged with a rack (1) supported on the lower side by rollers, a piston rod (9) of a fluid pressure cylinder Oυ is connected to this rack, and a switching valve is installed in the main body of this fluid pressure cylinder (9D). A fluid pressure source (not shown) is connected via -.

In addition, the hot water release detection sensor (S,) and the uplift groove detection sensors (8,) (8,) of spear 1 and spear 2 are connected to the input terminal of the control device a14), and the output terminal of this control device (foundation) is connected to the solenoid of the above-mentioned switching valve, and also connected to the electric motor (c) above.

Next, how to pour hot water into a ladle country? Figure 4 and spear 6 ladle 0
), the switching valve 6υ is operated in response to a start signal to lower the main body of the fluid pressure cylinder, and the outlet of the ladle is directed downward. When the molten metal is tilted and molten metal is discharged from the tap hole, the discharge detection sensor (S,) detects this.

When this sensor (S, ) detects hot water, the timer relay (TR) of the control device is activated, and the ladle 021 is tilted for the set time (T,) line 5 and the switching valve υ is returned to the neutral position. The tilting of the ladle c (3) is stopped and hot water continues to be dispensed in that state.The stopped state of the ladle is maintained for the time (T,) set by the timer relay (TR).

In normal case, before this time (r*) is completed.

It is set so that the molten metal rises up to the opening of the lifting part of the mold Q so that the lifting groove detection sensor (8,) of the grave is detected, and the detection by this sensor (S2) indicates the completion of pouring. Issue a command to operate the switching valve [F]υ in the opposite direction, raise the main body of the fluid pressure cylinder, rotate it in the normal return direction of the pot, and stop dispensing hot water. The time (T,) required for the ladle to return is also set by a timer relay (TR).

In addition, as shown in Figure 7 (4), the timer relay (T
Even if the time (T,) set by R) is completed,
If there is no detection by the raised groove detection sensor (S,), the ladle 02 is forcibly returned to its original position by a command from the timer relay (TR).

Such a tilting operation is repeated many times using the control device (incorporated) to sequentially pour the molten metal into the mold (13) on the plate aη, which is intermittently conveyed within the ladle.

Also, to explain how to check the remaining amount of molten metal in the ladle,
The number of pouring times is calculated in advance from the casting weight, and at the time of the first pouring, a limit switch of the spear 1 (not shown) at a fixed position is operated by a convex member of the spear 1 (not shown) provided near the middle of the tilting plate +411.

If the operation signal is used to incline the required number of times (for example, 10 times) by the instruction of the counting relay of the control device, the amount of molten metal in the ladle is determined to be insufficient.

The ladle c13 is returned to the horizontal position. In addition, if capacity is insufficient even if the required number of hot water dispenses is not reached, the tilting plate (4
When υ reaches the required tilting angle, the convex member of the spear 2 (not shown) provided on the top of the tilting plate (4υ) operates the limit switch of the spear 2 (not shown) at a fixed position, and upon receiving the operation signal, the ladle is turned off. 02 is returned to the horizontal position.The above-mentioned limit switches 1'F+ and spear 2 are provided on the rotating frame @, etc.

Next, how to adjust the tilting speed of the ladle? This will be explained based on FIG. 4 and an off-line diagram.

As shown in Figure 7 (α), the ladle C+' is activated by the timer relay (TR) from the detection of hot water output by the hot water output detection sensor (S,) between the above-mentioned time (T, ) and time (T2).
The time required to command lJ to return after a certain period of time (T
4) And.

The time required from the detection of hot water by the sensor (S,) to the detection of fried hot water by the fried hot water detection sensor (S2) of spear 1 (
If the time (Ts) is shorter than the time (T4), the time (T5) will fluctuate a little and cannot be used, and the sensor (S2) will At the same time as the fried water is detected, the return of ladle 02 is commanded, and the spear 1 (Fig.
As shown in the diagram, conversely, the time (T4) is
If 5) is long, it means that the pouring efficiency has deteriorated due to the reduction in the opening of the ladle 04.

At the end of time (T4), the ladle 03 is commanded to return.

For the next tilting of the ladle c34, the switching valve is operated according to the command from the control device, the fluid pressure cylinder 0η is driven, and the flow rate adjustment valve (2
), the tilting speed of the ladle 62 is increased. As a result, as shown in Figure 7 (c), the amount of hot water dispensed during the time (T, ) from when the hot water detection sensor (S, ) detects hot water until the ladle c33 stops is increased. I can do it.

In addition, as shown in Figures 4 and 8, to explain another pouring method, the hot water detection sensor (S,) is connected to the tap outlet (34).
The tilting speed of the ladle is increased for a period of time (T,) set by the timer relay (TR) from the time when hot water is detected, and the fried hot water detection sensor (S2) of the spear detects fried hot water. Before this, the ladle c33 is rotated in the return direction based on the time (T, XT,) IC set by the timer relay to reduce the amount of molten metal flowing out in advance. (s2) detects fried hot water, the time set by the timer relay (TR) (
Ts') Rotate the ladle 04 in the return direction.

Stop the hot water. If you do K like this, that sensor (S2
) can shorten the time from when hot water is detected to when hot water is actually stopped, and at the same time, it is possible to reduce unnecessary hot water.

In addition, if the sensor (S,) of the spear 1 detects the fried water of one mold (12), the sensor (8B) of the spear 2 detects the fried water of the other mold α4 first. Spear 2 sensor (
The ladle 04 may be returned to its original position as a pouring completion command such as the detection signal S, ).

Next, a method for adjusting the balance of the two tap ports C141C351 of the ladle 62 will be explained based on Figures 4 and 9.

When the amounts of molten metal flowing out from the two tap holes are different, the fried metal detection sensor (S2) of fang 1 detects the fried hot water in the lifted portion (4) of one mold a2; Since there is a detection difference between the fried water detection sensor (S,) of spear 2 that detects the fried water at the raised portion r5 of the other mold a3, this difference in detection time and the sensor (S2) ( The control device compares and examines how unbalanced the tap water outlet C341 ((51) is relative to the detection order of the hot water tap C341 (51), and depending on the unbalanced state, before the first tap tap, Control device
The electric motor (c) is selectively driven by a predetermined amount in the forward or reverse direction according to the command, and the vertical movement frame (to) is adjusted upward or downward by a predetermined amount. This balance correction may be carried out during or after the ladle r34 is returned.

The above balance correction amount and direction are determined by the balance correction sensor (S2).
) detects fried hot water 0.3 seconds or more earlier than sensor 1-2 (S, ) (more than 10, a seconds), the outlet ( Since the amount flowing out from the ladle 62 is too large, the electric motor (to), which is instructed to operate by the control device (2), activates the sensor (S) of the ladle 62.
2) The spout (2) on the side is adjusted upward by 5 pitches, and the first sensor (S,) is α2 higher than the second sensor (S,).
If fried water is detected ~0.8 seconds ahead (+0.2~+0
, 8 seconds), the outlet (goods) on the sensor (S, ) side of 1 year old 1
If the sensor 1 (s2) detects boiling water 0.1 to 0.2 seconds earlier than the sensor jp2 (S3) (10.1 to +α2 seconds). So 1.
? The tap outlet C34) on the side of sensor 1 (S2) was adjusted upward by 2 pitches, and the difference in detection time between sensor 1 (S,) and sensor 2 (Ss) was within ± (11 seconds). So,
The vertical movement is not corrected by the electric motor □□□, and the spear 2
sensor (S5) is O,1 more than sensor 1 (S2)
When fried water is detected ~0.2 seconds ahead (-0,1~-0
, 2 seconds), the outlet (goods) on the sensor (S2) side of fang 1
Since the amount of flow from the ladle 32 is too small, the electric motor (G), which is instructed to operate by the control device, moves the ladle 32.
The spout (support) on the sensor (S2) side of the spear 1 was adjusted downward by 2 pitches, and the sensor of the spear 2 (S,) was 0.2 to 0.3 lower than the sensor (S,) of the spear 1. When fried water is detected seconds later (-〇, 2 to -0.8 seconds), the sensor of spear l (
The spout (2) on the S, ) side was adjusted downward by 8 pitches, and the sensor of spear 2 (S5) was lower than the sensor of spear 1 (S2).
, If boiling hot water is detected for more than 8 seconds (-O, S seconds or more), multiple steps are performed to lower the tap on the sensor (S, ) side of spear 1 by 5 pitches. An upward correction area, an uncorrected area, and a plurality of stages of downward correction areas are set in the control device (goods). Incidentally, l pitch represents a predetermined length, and its specific value is determined depending on the situation at the site, and there are also issues such as how many pitches should be corrected in each area, and the number of pitches for the hot water detection sensor (8,). The relationship between the difference in detection time of S, ) and the amount of correction is determined depending on the situation at the site.

For example, as shown in Figure 4 and Figure 9,
As a result of the first pouring of hot water by the ladle at the mouth of the cup, the sensor (
82) Since the difference in detection time between Detection sensor (
Correct the outlet (b) on the S,) side by lowering it by 5 pitches? I took a bath for the second time. As a result, the difference in detection time mentioned above was corrected to 1αl~-0.2 seconds in the second pouring of hot water, but it was still in the 2-pitch downward correction region, so we made that correction and started the eighth pouring. went.

the result,? At the 8th hot water tap, the difference in the above detection time is ±α
It was corrected within 1 second, so I poured the bath for the fourth time without making any corrections. As a result, in the 4th tap, the difference in the detection time described above had expanded to +0.2 to +0.3 seconds, so the tap tap on the l-1 sensor (s2) side was adjusted up by 8 pitches. Then, I took a bath for the fifth time. After that, through repeated trial and error, corrections were made repeatedly so that the two molds (13Q3) would be completed at the same time.

Next, if the shape of the ladle 3) or the shape of the tap hole (2) is unbalanced, the specific properties of the ladle 0)
Even if the two tap holes (2) G are once adjusted to be balanced, due to the specific characteristics of the ladle country, as the ladle 32 is tapped repeatedly, the above balance will be disrupted. Then, before dispensing hot water for the second cup using the same ladle, the control device comprehensively examines the dispensing of hot water for each first cup, and determines the specific properties of the ladle. This is to determine the overall balance of the first ladle 63 before pouring the second cup of hot water.

For example, the number of times the hot water is poured for the first time and the second time is the ladle c.
321 appears to have an error in its initial installation, but after the 8th installation, there is a strong tendency for upward corrections to be made as a whole, although it once enters the uncorrected area.

And, as a way to easily detect the extent to which this upward correction is applied, there is an upward correction after the 8th time when the difference in detection time of the flaw detection sensor (S, XS,) first enters the uncorrected area. The remaining amount can be obtained by subtracting the amount and the downward correction amount. For example, the 5th 2-pitch downward correction and the 7th 2-pitch upward correction are canceled out, and the 4th 2-pitch correction is canceled out.
The third 3-pitch increase correction remains.

Therefore, the ladle 04 is judged to have a tendency to be revised upward by 8 pitches, and when the first cup of hot water is finished before the second cup of hot water is dispensed with this ladle 0. For the 10th time, I adjusted the increase by 8 pitches and started pouring water into the second cup.

As a result, the difference in the detection time of the fried damage detection sensor (S2) (S,) is significantly larger than the uncorrected area from the first pouring of the ladle to the end of the ladle c3 seconds after the 1st and 1st-2nd cup. It never comes off.

It is preferable that the detection sensor (S,
1 and the upper part of the raised part (a) I5η of the mold α and α, and it may be detected by bringing it into contact with the molten metal.

〔Effect of the invention〕

According to the first invention, after detecting hot water coming out of the ladle, the operation of the ladle is controlled by a timer relay.
When a change in the mold being received is detected, the machine will stop at 5KL.Therefore, even if the flow rate of hot water from the ladle changes with the progress of the number of times of pouring, there is no need to adjust the timer relay each time.

In addition, according to the second invention of Fang, before detecting a change in the mold while receiving the melt, the ladle is driven in the return direction for a time set in advance by a timer relay [to reduce the flow rate of the melt]. It is possible to reduce the unnecessary pouring of metal that is performed from the time when the completion of pouring into the mold is detected until the pouring of the metal is completely stopped.

[Brief explanation of the drawing]

The figures relate to one embodiment of the present invention, and Figure 1 is a plan view of the mold conveyance line. ? Figure 2 is a perspective view of the pouring device, Figure 3 (a) P) is a perspective view showing its operation, Figure 4 is a circuit diagram of its control system, and Figure 5 is a perspective view of the operating part of the flow rate regulating valve. ,
Figure 6 is a graph showing the method for pouring hot water into the molten metal, Figure 7 is a graph showing how to adjust the tilting speed of the ladle, Figure 8 is a graph showing the second pouring method, and Figure 9 is a graph showing how to adjust the ladle tilting speed. 3 is a graph showing a balance adjustment method. DI (l tank...mold, Cl21...ladle.

Claims (2)

[Claims] (1) When hot water is detected coming out of the ladle, the timer relay is activated by K and the ladle is tilted for a set time, and then the ladle is stopped tilting and hot water continues to be poured. A pouring method characterized by detecting changes in the mold, commanding completion of pouring, driving the ladle in the return direction, and stopping pouring. (2) By detecting hot water being dispensed from the ladle, the timer relay is activated to tilt the ladle for a set time, and then the timer relay stops tilting the ladle for the set time to dispense hot water. , and then drive the ladle in the return direction for the time set by the timer relay.
The system then stops the return of the ladle and reduces the flow rate of tapping, and when a change in the mold being received is detected, it commands the completion of tapping, drives the ladle in the return direction, and stops tapping. Pouring method.