JPS58110169A - Charging method - Google Patents

Abstract

PURPOSE:To supply proper amts. of molten metal in casting molds in a specified time without adjusting timer relays with respect to a change in the rate of tapping by adjusting the next tilting speed of a ladle in such a way as to keep the time between the time when tapping is detected and the time when the riser metal of the molds is detected within the set time. CONSTITUTION:When a large amt. of molten metal is put into a ladle 32 and is tapped therefrom by moving a hydraulic cylinder 44 downward first and tilting tapping ports 34, 35 downward, a sensor S1 detects the same. Then, a timer relay (TR) operates to stop the tilting of the ladle after a set time T1 and to continue the set time T2 as it is. In the normal time, a sensor S2 detects the rise of the molten metal up to the opening in the riser 56 of a casting mold 12 prior to the terminating of the time T2 and resets the ladle to stop the tapping. When there is no detection of the sensor S2 even after the completion of the time T2, the TR resets the ladle. The time T1+T2=T4 and the difference T5 between the detecting times of the sensors S1 and S2 are compared, and the case at T4<T5 signifies a decrease in charging efficiency. In such a case, the ladle is reset at the end of the time T4, and the tilting speed is increased by adjusting the degree of throttling of a throttle valve 84 prior to the next tilting of the ladle.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for smoothly pouring molten metal in casting.
It is 0.

Technical background of the invention and its problems Conventionally, there has been a method of automatically controlling the tilting and reciprocation of a pouring weir pot.
There are two methods, such as a pouring method in which tilting and return times are set in advance and controlled by a timer relay, and a pouring method in which control is performed by detecting the sprue of the mold with a sensor. However, as the number of times pouring progresses, the ladle outlet may shrink or erode, and when using a timer relay, the amount of molten metal poured into the mold changes, making it difficult for the mold to be sufficiently filled with molten metal. When using a sensor, pouring time becomes longer and the production amount per unit time decreases.

Purpose of the Invention The present invention has been made in view of the above points. Even if the amount of molten metal poured into the pot O changes, the amount of molten metal poured into each casting [K%-] can be adjusted to an appropriate amount without adjusting the timer relay. The aim is to be able to supply this within a certain amount of time.

Summary of the Invention In the pouring method of the present invention, the pouring hot water and the rising hot water of the mold are detected by centK, respectively. It is characterized by controlling so that the above-mentioned fried hot water is detected within the above-mentioned set time by stopping the discharge at the same time as the end of the set time and also increasing the tilting speed of the ladle for the first time. It has a number structure.

Embodiment of the Invention Next, an embodiment of the present invention will be described based on the drawings. Core storage part (2
1, pouring part (3), mold reversing part (4) for removing objects that obstruct weir folding, sprue folding part (5), lifting paper folding part (6), mold cutting part (7), and casting part Cooling or heating section (8
) are arranged sequentially. In addition, each mold conveyance plate σDK
is two cast w1. α3 (13 is fixed.

Next, as shown in FIG. To)
The ladle support on the right side of K is removably attached, and the body of the electric motor whose rotation amount can be controlled is fixed via the frame on the above-mentioned swing column 01. The screw connected to the rotation axis KIII of this motor (c) is screwed into the upper part of the vertical movement frame (to) @f:Rk, and the left side Gon nabe support body 4 is detachably attached to the bottom of this vertical movement frame (to). Attached, both left and right O above
A ladle 64 with a fan-shaped longitudinal section is supported by a spherical bearing 6υ provided on the bottom 11 of the R pan support (Foundation) @O.
It is rotatably supported by using the tilting shafts (to) on both left and right sides. Top t! The ladle (to) K is provided with two tap holes A4 (to), and a gas burner (not shown) is directed from these tap holes A4 (to) to the hot water level in the ladle. . The above rotating frame (to) is a ladle [with]
When replacing the cast iron, discharging residual metal, adjusting the outlet (to), etc., the casting funnel should be rotated so as to escape to the outside of the casting line (11). is fixed in the state of

In addition, in Figure 2, a fan-shaped tilting plate (41J) similar to the longitudinal section of the ladle is placed on the right side of the ladle, and a bearing provided on the right side of the support frame The shaft of the tilting plate In is rotatably supported.This shaft I is provided concentrically and separately from the tilting support shaft on the left side of the ladle. Attach the tip of the piston rod (c) 6 of the fluid pressure cylinder to the right lower part, and connect the base end of the main body of the hydraulic cylinder - η and the lower end of the fan-shaped tilting plate @chin to the chain. This chain is wound around the rocket wheel, which is rotatably supported on the upper right side of the revolving frame (2), and also around the arcuate surface 6 of the sector-shaped tilting plate ←υ. Then, an engaging piece protrudes from the right lII surface of the ladle (to) to the tilting plate @IJ@, and an engaging protrusion protrudes from the tilting plate @υ to the ladle 03@, The lower l&ilK engagement piece 621t of the engagement protrusion engages.

Then, when replacing the ladle mentioned above.

Above III! Rotate the rotating support circle and rotate the rotating frame (c)
Opened at 11i1 outside the mold conveyance line Ill, the ladle supports (to) (supports) on both sides are integrally connected to the support frame (c) between the ladles.
And remove it from the vertical movement frame (to), and remove the tilting plate from the support frame (2).
Leave it at 3.

Next, as shown in Figure S (a), there are three detection sensors? (1,)(II,)(11,) are provided. This detection sensor (8,) (1,) (1,) uses, for example, a radiant high temperature needle (photo sensor) to detect the light of the molten metal with a light receiving part.

The hot water detection sensor (S,) is mounted on a support stand (not shown) toward the left hot water outlet (to) of the ladle □□□.

Also, the age 1 and 2 age hot water detection sensors (8,) (II
, ) are the two molds tl'l on the mold transport plate αυ.
Towards the opening of the paper lifting section @6η of J Q3 [provided respectively. In addition, each cast mαri α3 has two raised parts (to) 6D, and the above sensors (8□) (!Is) are provided facing the opening of the left vk raised part ma'n. .

6 [1 is the sprue part where the molten metal is poured.

Next, as shown in Fig. 5, tilt the spout (end) of the ladle (end) downward and pour the molten metal into the sprue (end) of the mold. When performing this, the main body of the fluid pressure cylinder is lowered by fluid pressure with respect to the piston rod in the fixed position, and the tilting [11] is rotated upward, and the engagement piece 53 of the tilting plate ha is rotated upward. Push up the ladle HO engaging protrusion and open the 2iE outlet (to) of ladle 0'a.
(to) downward. In addition, from the sprue part (to), mold α2
(When the molten metal injected into the casting ml a2 Q3 becomes full, it overflows into the final Kwh#) part @6η.

In addition, when adjusting the balance between the two spouts (goods) (to) of the ladle (to), as shown in Figure 43 (5), for example, as shown in 11wJ (@). If the amount of molten metal flowing out from the right spout is too large, drive the electric motor (to) to rotate the screw shaft and lower the vertical movement frame (to) that is screwed into this screw shaft rnK. The left side of the ladle supported by the moving frame is lowered by a predetermined amount to equalize the amount of molten metal flowing out from the left and right tap holes.

Next, as shown in Figure 4, a control system is installed to control the tilting of the ladle and the balance of the two tap holes CI4@.

That is, the fluid pressure cylinder 4 is supplied from a fluid pressure source (not shown).
A part of the fluid supply and discharge pipe that supplies and discharges fluid pressure to and from the switching valve υ through the switching valve υ consists of a check valve and a variable restrictor type flow rate adjustment valve shown in Figure 5. A controller is interposed, a pinion shaft (goods) is connected to the adjustment rotation shaft ■ of the above flow rate regulating valve (goods), and the pinion 8 of this pinion shaft ■
19 is engaged with a rack whose lower surface is supported by a roller (c), and this rack (e) K fluid pressure cylinder 0υ
A fluid pressure source (not shown) is connected to the main body of the fluid pressure cylinder e1) via a switching valve.

In addition, the above-mentioned hot water detection sensor (S,) and spear 1. jP20
The Yomyouyu detection sensor (8,) (g,) is connected to the input terminal of the control device, and the output terminal of this control device is connected to the solenoid KWl of the switching valve υ-, and the electric motor 4 is connected to the solenoid KWl of the switching valve υ-. ! Continue.

Next, the pouring method for working the composter will be explained based on Figs. 4 and 6.

A large number of #I type O molten metals are distributed into the ladle ■, and the main body of the fluid pressure cylinder is lowered by operating the switching valve -υ in response to the start signal, and the tap hole of the ladle country ( To) (To)
When the molten metal is tilted downward and molten metal comes out from the tap hole (b), this hot water tap detection sensor (8,) detects it.

When this sensor (B,) detects hot water, the timer relay (Tl) of the control device is activated.L% When the ladle □ is tilted for the set time (T,), the switching valve is returned to the neutral position and the ladle (Tl) is activated. (to) is stopped (1), and hot water continues to be dispensed in that state.This stopped state is maintained for the time (i2) set by the timer relay (?R).

In normal case, before this time (Te2) is completed,
Watch the molten metal rise up to the opening of the lifting part in 1a2.
The Yomyoyu detection sensor (82) detects this, and upon detection by this sensor (8,), a command to complete pouring is issued, the switching valve @υ is operated in the opposite direction, and the main body of the fluid pressure cylinder I is activated. Raise the ladle and rotate the ladle towards the back of the room to stop dispensing hot water. The time (T,) required for the return of the ladle (to) is also set by a timer relay (〒1)K. In addition, if the hot water detection sensor (8,) of the spear 1 is not detected even after the time (i,) set by the timer relay (T wing) K is completed, as shown in Figure 1 (south). is a timer relay (TB
), the ladle is forcibly returned to its original position.

Such a tilting operation is repeated many times centering on the control device (to), and the molten metal in the ladle (to) is sequentially poured into the mold (13) on the plate aυ that is intermittently conveyed.

Also, be sure of the amount of molten metal remaining in the ladle! To explain this, the number of pouring times is calculated in advance from the cast weight, and at the time of the first pouring, a first convex member (not shown) installed near the middle of the tilting plate -υ is used to move the metal to two fixed positions (not shown).
Operate limit switch 1.

According to the instruction from the counting relay of the control device from the operation signal, if the ladle is tilted the required number of times (for example, 10 times), the amount of molten metal in the ladle is insufficient, and the ladle is placed in a horizontal position. to be restored. Also, the required number of hot springs was not reached.
If the capacity is insufficient, the tilting plate (41) reaches the required O#! Operate the limit switch and receive the operation signal from the ladle (
(To) returns to horizontal position, still on top! The limit switches for the swivel 1 and the spear 2 are provided on the rotating frame 4, etc.

Next, how to adjust the tilting speed of the ladle■ Figure 4 and jl
This will be explained based on Figure '7.

As shown in the diagram, the sum of the above time (T,) and time (T,), that is, the detection of hot water by the hot water detection sensor (8,)K, and the timer relay (Tl) K to the ladle (T,). )
The time it takes to issue a return command after a certain period of time (T4
) and seven! The control device compares the time (T,) required from the detection of hot water by sensor (8,)K to the detection of hot water by hot water detection sensor (8,)K, and calculates the time (T4)K.
On the other hand, if the time (!-) is short, there is no problem even if the time (T,) changes slightly, and the sensor (8,)K detects the fried water and at the same time commands the preparation of the ladle (to). In addition, as shown in Fig. 7 (a), when the time (T,) is longer than the time (〒4), pouring water is This means that the efficiency is inferior, so at the end of time (T4), the command is given to return the IiL ladle (to), and the next time the ladle is tilted, it is controlled by the command from the control @ device. Operate the switching valve to drive the fluid pressure cylinder 0υ, force the binion rack mechanism, and adjust the degree of restriction of the flow rate regulating valve to control the tilting speed of the ladle. Make it faster. As a result, the spear 7 figure (#
) K As shown in the figure, the amount of hot water dispensed during the time (T, ) from when the hot water detection sensor (B,) detects the hot water supply until the pot country stops can be increased.

Also, to explain the KaO pouring method as shown in the jP4 diagram and the ys diagram, the timer relay (fi
l) Increase the tilting speed of the ladle (to) for the time (T,) set by K, and set by the timer relay before the fried hot water detection sensor (B-) detects the fried hot water. Once the ladle (toward) is rotated in the direction of the backside based on the 5vc, the amount of molten metal flowing out is reduced in advance, and the fried hot water detection sensor (8,) of the spear is detected. When hot water is detected, turn the hot pot (to) in the return direction for a time <r set by the timer relay (TR) and stop dispensing hot water. The time from when the hot water is detected to when hot water is actually stopped can be reduced, and unnecessary hot water can be reduced.

In addition, if the sensor (S,) of spear 2 detects the lifting hot water of the other mold 0z before the sensor (8,) of jp1 detects the fried hot water of the other mold 0z, this discrepancy will be detected. 2 cents t(a
The detection signal i,) may be used as a pouring completion command to return the ladle (2).

Next, a method for adjusting the balance of the two tap holes (to) of the ladle (to) will be explained based on Fig. 4 and Fig. 9.

If the amount of molten metal flowing out from the two tap holes r34ci is different, the molten metal detection sensor that detects the lift b# of the lifting wheel of one mold α2? (g,) and the Yangshoyu detection sensor of the spear 2 that detects the Yangshoyu of the Yangka part 6η of the other casting 11QI?
(!l,), so depending on this difference in detection time and the detection order of sensors (8,) and (1,), it is possible to determine the relative unbalance of the outlet @(to). The control device 1NK compares and examines whether the current is the same, and depending on the unbalanced state 11AK, the electric motor (to) is selectively placed in the forward or reverse direction l# by a command from the control device - before the next hot water tap. The vertical movement frame (to) is adjusted upward or downward by a predetermined amount by driving a fixed amount. This balance correction may be done in row 5 during or after the return of the ladle.

The above balance correction amount and direction are determined by the balance correction sensor (sl).
) detects Yomyouto more than α8 seconds before the sensor (8,) of the spear 2 (+a8α8 seconds), then the sensor of the spear 1? (
8.) Since the amount of flow from the spout (to) of lit is too large, the electric motor, which is instructed to operate by the control device, controls the amount of tl of the ladle (to)! (11,)@
Increased the outlet (goods) by 5 points, and also
The sensor (S,) of ? α2 than the sensor (8,) of 2
When Yojoyu is detected ~a8 seconds later (+a2 to +a3 seconds), the hot water outlet (to) on the sensor (8,) side of spear 1 is adjusted upward by 3 pitches, and Rigasai 2
When fried water is detected a1 to α2 seconds earlier than the sensor (S,) (+α1 to +a2 seconds), the sensor (8)
, ) II's outlet (to) was revised up by 2 pitches, and j? l o-tt:, pfC8,) Rot? (
If the difference in detection time between the sensor (8,) and .If hot water is detected 2 seconds ahead (-α1 to -α2 seconds), the dimensions are:
Sensor C8, )14 C) Since the amount of flow from the tap hole (to) is small, the electric motor that has been commanded the operating amount from the control device causes the ladle (to) to be moved by the electric motor. The center of tc8.) @ was corrected by 2 pitches downward, and the sensor (1) of jjp2 was jPI 0-1r:/
If hot water is detected 4a2~a8'□ seconds before l(8,) explosion (-
α2~-α3 seconds), the inner sprue on the sensor (8R) side of spear l was adjusted downward by 8 pitches, and the sensor of jp2 was adjusted downward by 8 pitches.
If (-1) detects Uiseyu more than a8 seconds before the 10th sensor (8,) (-a3 seconds or more), then 10th sensor? (1,) Multiple steps of upward correction area and no correction area, so as to correct the Yu O outlet (goods) downward by 5 pitches,
A plurality of descending correction areas are set in the control device, where i pitch represents a predetermined length, and the specific value is determined according to the situation at the site, and the amount of correction in each area is determined. The problem of how many pitches to make, and the fried 9 hot water detection sensor (liri)
The relationship between the detection time difference and the correction amount in 'i) 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 from the ladle of Cup 1 (1), the difference in detection time between the sensors (J, XS,) was more than 8 seconds, so the electric motor was ＠Fried hot water detection sensor (8,) Ill of the ladle (equipment)
The tap water opening was adjusted downward by 5 pitches and the hot water was tapped for the second time. As a result, the difference in detection time mentioned above was corrected to -α1 to -0.2 seconds in the second pouring of hot water, but there was still a 2-pitch downward correction area K, &T, so we made that correction.
I went to the bath for the 8th time.

As a result, the difference in the above detection time is ±
O modified within at seconds, spear 4a without modification
I went to see the hot water. As a result, the difference in the above detection time expanded to +a2 to +13 seconds in the fourth as-hot bath. The fifth pouring of hot water was carried out.From now on, such a process of trial and error was repeated, and corrections were made repeatedly so that the 2 儒0*IlαriI processes were completed at the same time.

Next, depending on the specific properties of the ladle claK, such as the shape of the ladle @ (to) and the balance of the shape of the outlet (to), the outlet C34 (to) of 211 was temporarily modified to be balanced. [Also, due to the nature of this ladle c (aO * constant O, as the number of times the ladle - comes out 1), the above balance will be disturbed, and between the same ladle it will be 2 cups @O
Before pouring the hot water 5 times, the 1g control device comprehensively examines the hot water pouring each time on the 11th floor, determines the specific properties of the ladle, and before pouring the hot water for the 2nd time. This is to perform integrated balance adjustment of one ladle Qo.

For example, in the number of baths for the first time and the first time for 21g, an error appears in the first dressing of the ladle @O (supposedly 7), but from the first time onwards, it is once in the uncorrected area, but the whole There is a strong tendency for it to be revised upward.

A method for easily detecting the extent to which this upward correction has been applied is as follows: The remainder can be obtained by subtracting the upward correction amount and the downward correction amount. For example, the 2-pitch downward correction for the 5th @ and the 2-pitch upward correction for the 4th time are offset, and the 8-pitch upward correction for the 4th time remains.

[Ko041 pot (2) is a comprehensive KJI! , ``I judged that this ladle (
Before pouring the second cup of hot water, adjust the increase of 3 pitches to the 10 times HK that was in the state when the first time was completed, and start pouring 2 times 10 times.

Therefore, the difference in the detection time of the boiling hot water detection sensor (8,) (g,) for ladle Q after pouring the hot water for the second time, from the first hot water pouring until the end of the hot water, deviates greatly from the uncorrected region. Never.

The detection sensor (1B,) (S,) (8,) is as follows:
It is preferable to use a device that detects the light from the molten metal without contact, such as a high-temperature radiation needle (photo sensor), but insert an electrically conductive detection needle into the tap hole (to) and the upper part of the ejection part -6η of the mold r1 and αJ. You can also do this for 5K by letting it come into contact with the molten metal and detecting it.

Effects of the Invention As described above, according to the present invention, the hot water detection sensor that detects the hot water coming out from the hot water outlet of the ladle and the hot water detection sensor that detects the hot water in the hot water part of the mold. The detection time from tapping to the completion of pouring into each mold was monitored, and the tilting speed for the next tilting of the ladle was adjusted so that the detection time was kept within a certain set time. In response to changes in the amount of molten metal flowing out due to the reduction in size of the tap opening of the pot, an appropriate amount of molten metal can be supplied to each mold within a fixed time without adjusting the timer relay, and a drop in pouring efficiency can be prevented.

[Brief explanation of the drawing]

The figures relate to one embodiment of the present invention; Fig. 1 is a plan view of the conveyor, Fig. 2 is a perspective view of the pouring device, and Fig. 8 is a perspective view of the pouring device.
a) Return) is a perspective view showing its operation, Figure 4 is a circuit diagram of its control system, and Figure 6 is a perspective view of the operating part of the flow rate regulating valve.
Figure 'F6 is a graph showing the method of pouring molten metal, and Figure 7 is a graph showing the method of adjusting the tilting speed of the ladle. tS diagram is spear 2
Figure 9 is a graph showing how to balance and adjust the ladle. Q) 03... Mold, (To) 9 Ladle, (To) (To)
・Outlet, −・Fluid pressure cylinder, @To・・Yomaebe, −
・・Gate part, −・Fluid fluid supply and discharge pipe, −・Flow rate adjustment valve, (
8,)... hot water detection sensor, (g,) (8,)... hot water detection sensor pipe.

Claims (1)

[Scope of Claims] (11. If the hot water is detected and the hot water is not detected within a certain period of time after the hot water is detected, the above set time is determined. At the same time as the hot water is finished, the hot water dispensing is stopped, and the next time the tilting speed of the O ladle is made uniform, KIII is controlled so that the above-mentioned sand bath is detected within the set time.
Pouring method.