JPS6150706B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic pouring device for casting equipment.

In conventional casting equipment, drawing molten metal from a melting furnace into a ladle and pouring molten metal from the ladle into a mold are performed manually. A conceivable device for automatically pouring metal is one in which a ladle containing molten metal is manually moved above the mold in a melting furnace, and then the ladle is tilted to pour the molten metal into the mold. In this case, the ladle is tiltably attached to a ladle carrying member that moves between the melting furnace and above the mold, but if the ladle is attached normally, the pouring spout will change as the ladle tilts. The position will change. Therefore, as it is,
The sprue of the mold had to be made larger than necessary,
It is uneconomical. By moving the ladle carrying member as the ladle tilts, or by attaching the ladle to the ladle carrying member through a special mechanism, the spout position will not change even if the ladle tilts. However, in either case, the overall structure of the device is generally complicated. Further, since it is necessary to attach a mechanism for tilting the ladle in addition to the ladle to the ladle transport member, it is difficult to put only the ladle into the molten metal of the melting furnace and scoop it out.

This invention solves the above problems and is a simple automatic pouring device that can automatically draw up and pour molten metal, and has a structure in which the position of the spout hardly changes even if the ladle is tilted. The purpose is to provide

The automatic pouring device according to the present invention includes a ladle transportation device that moves a ladle transportation member fixed to the lower end of a vertical arm between the upper part of the melting furnace and the upper part of the mold, and also moves it up and down above the melting furnace. , two horizontal guide rollers mounted parallel to each other on the lower part of the ladle transport member and having an annular groove formed on the outer peripheral surface; a gear mounted parallel to the guide rollers on the upper part of the ladle transport member; and a ladle. It has an arc shape centered on a horizontal axis parallel to the guide rollers below the conveying member, and the inner circumferential part fits into the annular grooves of the two guide rollers from above, and the teeth formed on the outer circumferential surface meet the lower part of the gear. A ladle support member is passed between the gear and the guide roller so as to mesh with each other, a ladle is fixed to the ladle support member such that the spout is located near the horizontal axis, and the gear is rotated to remove the ladle support member. The ladle tilting device tilts the ladle by moving the ladle support member in the circumferential direction.

This pouring device automatically pours molten metal into a ladle and pours it into a mold as follows. That is, first, the ladle is moved above the melting furnace using a ladle transport device, the ladle is moved downward and placed into the molten metal of the melting furnace, and then pulled upward to pour an appropriate amount of molten metal into it. Add metal. Next, move the ladle above the mold. Then, with the ladle transport member stopped, the ladle support member is moved in the circumferential direction by the ladle tilting device to tilt the ladle, and molten metal is poured into the mold from the spout. At this time, the arc-shaped ladle support member moves in the circumferential direction around its central horizontal axis, and the pouring spout of the ladle, which is fixed to the ladle support member, is located near this axis. Therefore, even if the ladle is tilted, the position of the spout will hardly change.

Since the automatic pouring device according to the present invention has the above configuration, only a part of the ladle support member and the ladle are placed in the molten metal of the melting furnace, and the molten metal is automatically poured into the ladle. It is possible to automatically pour hot water by tilting the ladle. and,
Even if the ladle is tilted with the ladle transport member stopped during pouring, the position of the spout hardly changes.
Therefore, there is no need to make the sprue of the mold particularly large, which is economical. Further, since the ladle is simply attached to the ladle transport member via a ladle support member with an extremely simple structure, and there is no need to move the ladle transport member while tilting the ladle, The structure of the entire device is simple.

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the left side of FIGS. 1 and 2 is referred to as the front, the right side of the same figure is referred to as the rear, the lower side of FIG. 2 is referred to as the left, and the upper side of the same figure is referred to as the right.

Figures 1 and 2 show a part of automatic casting equipment for aluminum alloy castings. Above a floor 1, there is an upper conveyor 3 for pouring mold 2 forward, and a mold 2 after pouring. Lower conveyors 4 are arranged above and below to send the water to the rear. In addition, these conveyors 3,
A melting furnace 5 is arranged on the floor 1 on the right side of the melting furnace 4, and an automatic pouring device 6 is provided between the conveyors 3, 4 and the melting furnace 5. Mold 2 placed on upper conveyor 3
is sent forward intermittently, and in the middle of this transfer, it is stopped at the pouring position 7 on the left side of the melting furnace 5 for a certain period of time. Molten aluminum alloy (molten metal) is poured into the mold 2 stopped at this position 7 by the pouring device 6 as described later, and the mold 2 after pouring is further moved forward by the upper conveyor 3. Sent. The poured mold 2 that has been sent to the front end of the upper conveyor 3 is transferred to the front end of the lower conveyor 4 by a lifter (not shown), and is similarly sent rearward by the lower conveyor 4.

As shown in detail in FIGS. 3 to 8, the pouring device 6 is a mechanism for moving a ladle conveying member 8 between the melting furnace 5 and above the mold 2 at the pouring position 7 of the upper conveyor 3. A ladle transporting device 9 and a ladle transporting member 8 which has an arc shape centered on a horizontal axis (central axis) C below the ladle transporting member 8 and can move in the circumferential direction around this axis C. ladle support member 10 attached to
a ladle 12 fixed to the ladle support member 10 so that the spout 11 is located near the central axis C; and a ladle tilting device for moving the ladle support member 10 relative to the ladle transport member 8. 13, and a control device (not shown) for these.

Details of the ladle transport device 9 are shown in FIGS. 3 to 6.

That is, a circular hole 16 is drilled in the center of the top plate 15 of the fixed base 14 installed on the floor 1, and a cylinder 1 is formed vertically protruding upward at the periphery of the hole 16.
7 is fixed. Fixed base 1 around cylinder 17
4, a plurality of swivel guide support members 18 having horizontal sliding surfaces at their upper ends are symmetrically arranged. A horizontal disc-shaped swivel base 19 is rotatably attached to the outer periphery of the cylinder 17, and a sliding ring 20 fixed to the lower surface of the outer periphery of the swivel base 19 slides on the sliding surface of the guide support member 18. It can be placed freely. Swivel stand 19
A worm wheel 21 that rotates together with the worm wheel is attached to the lower side of the worm wheel. A worm shaft 22 that is long in the front and back is supported on the fixed base 14, and a worm 23 provided on the worm shaft 22 is connected to the swivel base 19.
The worm wheel 21 is engaged with the worm wheel 21. The rear part of the worm shaft 22 passes through a gear box 24 fixed to the rear side of the fixed base 14, and a turning DC motor 25, which is mounted downward on the gear box 24, is driven through bevel gears 26 and 27. It is connected to the worm shaft 22. The rotation of the motor 25 is controlled by the bevel gear 2.
6, 27, and is transmitted to the worm wheel 21 by the worm shaft 22 and the worm 23, thereby causing the swivel base 19 to rotate around the cylinder 17. Note that the swivel base 1 is attached to the front end of the worm shaft 22.
An angle detector 28 that detects the rotation angle of the worm shaft 22 is connected to detect the rotation angle of the worm shaft 22.
A manual handle connection portion 29 is formed at the rear end of the worm shaft 22 . Further, the space between the upper part of the fixed base 14 and the swivel base 19 is covered with a cover 30.

A vertical turning tower 31 is fixed on the turning table 19. The swirling tower 31 has a vertically elongated box shape with an open rear surface, and a pair of quarter-cylindrical doors 3 are installed at the rear edges of left and right side plates 32 to seal the rear side of the swirling tower 31.
One side edge of 3 is attached by a hinge. Further, the top plate 34 of the swirling tower 31 extends horizontally rearward so as to seal the upper side of the pair of doors 33 in a closed state.

Two rows of vertical guide rails 36 on the left and right are fixed to the inner surface of the front plate 35 of the turning tower 31, and guide blocks 38 are fixed on the upper and lower sides of the left and right sides of the front surface of the elevating member 37.
are attached to these rails 36 so as to be vertically slidable. The middle part of the hydraulic cylinder 39, which is arranged upward in the turning tower 31, is rotatably attached to the lower part of the inner surface of the front plate 35 by a horizontal pin 40 extending left and right, and the upper end of the piston rod 41 can be moved up and down in the same way. It is attached to the front part of member 37.
As the rod 41 expands and contracts, the elevating member 37
moves up and down between an upper end position shown by a solid line in FIG. 3 and a lower end position shown by a chain line in the figure. In addition, the swirl tower 31
In the upper and lower intermediate parts of the inner surface of the front plate 35 and the elevating member 37,
Both ends of a cable carrier 42 holding electric wires and air hoses are connected.

Left and right rails 36 on the top of the front plate 35 of the turning tower 31
A vertically elongated opening 43 is provided between the two. Edge plates 44 that extend forward at right angles and then curve outward at right angles are integrally formed on both left and right edges of the opening 43, and edge plates 44 that extend horizontally forward of the edge plates 44 are formed on both upper and lower edges of the opening 43. Bellows support plates 45 and 46 are provided that extend over the sides and close both upper and lower ends thereof.
A front plate 35 is installed on the upper part of the elevating member 37 in the swirling tower 31.
A cylindrical horizontal arm 47 extending forward through the opening 43 is fixed, and this arm 47 has upper and lower covers 48 that close the opening 43 from the front side of the edge plate 44 in the required range above and below the arm 47. 49 is fixed. These covers 48 and 49 have a substantially U-shaped cross section, and the lower part of the upper cover 48 and the upper part of the lower cover 49 are formed in a semi-cylindrical shape along the outer periphery of the arm 47. and,
These covers 48 and 49 are connected to each other while sandwiching the arm 47 from above and below. Bellows 50 and 51 are attached between the upper bellows support plate 45 and the upper surface of the upper cover 48 and between the lower surface of the lower cover 49 and the lower bellows support plate 46, respectively. The lower end plate 52 of the upper bellows 50 and the upper end plate 53 of the lower bellows 51 are connected to the swirl tower 31.
The upper and lower bellows 50, 51 also fit between the front plate 35 of the cover 48, 49 and the opening edge 44 of the cover 48, 49.
It's blocking 3. A gear box 54 is fixed to the front end of the horizontal arm 47, and a ladle carrying member 8 is fixed to the lower end of a cylindrical vertical arm 55 fixed to the lower surface of the gear box 54.

Details of the ladle carrying member 8, ladle support member 10 and ladle 12 are shown in FIGS. 7 and 8.

The ladle carrying member 8 has a box shape, and three horizontal shafts 56 and 57 extending left and right are fixed in parallel to each other inside the ladle carrying member 8. Guide rollers 58 are rotatably attached to the lower two shafts 57, and a shallow annular groove 59 is formed in the middle of each roller 58.
is formed. Gears 60 connected to each other on the remaining shafts 56 above these rollers 58
and a bevel gear 61 are rotatably attached.

The ladle support member 10 has a rectangular cross section, and teeth 62 are formed on its upper surface (outer peripheral surface). The support member 10 passes through the conveying member 8 and is inserted between the two rollers 58 and the gear 60, and the lower part (inner peripheral part) is fitted into the groove 59 of the roller 58, and the teeth 62 are inserted into the gear 60. They are held in place by interlocking.

The rear end of the ladle 12 is fixed to the rear end of the support member 10, and the spout 11 at the front end of the ladle 12 is connected to the support member 1.
It is located slightly in front of the center axis C of 0. and,
By rotating the gear 60 of the carrying member 8, the supporting member 1
0 moves in the circumferential direction guided by two rollers 58, so that the ladle 12 is placed around the axis C. A circular hole 64 is provided in the center of the bottom wall 63 of the ladle 12.
The upper part of the hole 64 is surrounded by a cylindrical part 65 which is formed integrally with the bottom wall 63 and is open at the top and bottom. The height of this cylindrical portion 65 is slightly lower than the height of the peripheral wall 66 of the ladle 12.

Details of the ladle tilting device 13 are shown in FIGS. 3 to 5,
As shown in FIGS. 7 and 8.

A vertical arm 55 is attached to the top plate 67 of the ladle carrying member 8.
A vertical shaft 68 that penetrates from the lower part of the interior and protrudes into the carrying member 8 is rotatably supported, and a bevel gear 69 fixed to the lower end of this shaft 68 is connected to the bevel gear 61 of the carrying member 8. They are together. Arm 4
A vertical shaft 70 that passes through the gear box 54 and projects into the vertical arm 55 is rotatably supported by the gear box 54 between the gear box 7 and 55. A vertical intermediate shaft 71 is disposed within the vertical arm 55, and both upper and lower ends of the shaft 71 are connected to the lower end of the upper vertical shaft 70 and the upper end of the lower vertical shaft 68 via universal joints 72 and 73, respectively. . It passes through the horizontal arm 47 in the axial direction, and both front and rear ends are connected to the inside of the gear box 54 and the turning tower 3.
A horizontal shaft 74 protruding into the inside of the shaft 74 is rotatably supported, and the front end of this shaft 74 is connected to the upper vertical shaft 70 via bevel gears 75 and 76. Also,
A ladle tilting DC motor 77 is attached to the upper part of the horizontal arm 47 in the swirling tower 31, and this motor 77 is connected to the rear end of the horizontal shaft 74 via a belt 78.

The ladle tilting motor 77 is rotated by a belt 78, a horizontal shaft 74, bevel gears 75, 76, an upper vertical shaft 70,
Intermediate shaft 71, lower vertical shaft 68 and bevel gears 69, 6
1 to the gearwheel 60 of the conveying member 8, with the result that the ladle 12 is tilted as described above. Note that a motor 77 is used to detect the inclination of the ladle 12.
An angle detector 79 for detecting the rotation angle of is mounted on the upper part of the horizontal arm 47 in the rotating tower 31 and connected to the motor 77 by a belt 80. The ladle 12 is tilted by the control device controlling the motor 77 based on external settings, the output of the angle detector 79, and the like.

The portion from the horizontal arm 47 to the ladle 12 is shown in solid line in FIG. It moves up and down between the upper end position shown and the lower end position shown by the chain line in the figure. When these are at the upper end position, the ladle 12 is located slightly above the upper end of the melting furnace 5, and when these are at the lower end position, the lower side of the vertical arm 55 is inside the melting furnace 5. Therefore, the ladle 12 is sunk slightly below the surface L of the molten metal in the furnace 5. Note that the ladle 12 is raised and lowered by the control device controlling the hydraulic cylinder 39.

In addition, the portion from the horizontal arm 47 to the ladle 12 turns left and right in accordance with the turns of the turning table 19 and the turning tower 31 of the ladle transport device 9 while being at the upper end position, and as a result, the ladle 12 moves between above the melting furnace 12 and above the mold 2 located at the pouring position 7 of the upper conveyor 3. The ladle 12 is turned by the control device controlling the turning motor 25 based on external settings, the output of the angle detector 28, and the like. Note that the horizontal arm 47 pivots at equal angles left and right from a reference position shown by solid lines in FIGS. 2 and 5, and this angle is set in the control device. Moreover, the setting of the reference position of the horizontal arm 47 is as follows.
This is done by attaching a manual handle (not shown) to the manual handle connecting portion of the worm shaft 22 of the ladle transporting device 9, and using this handle to rotate the worm shaft 22 and swing the horizontal arm 47 to the reference position. However, the setting of the turning angle of the horizontal arm 47 is not limited to the above method.

As shown in FIGS. 7 and 8, the arm 4
An air hole 82 is provided in the rear plate 81 of the gear box 54 between 7 and 55 to communicate between the inside of the horizontal arm 47 and the inside of the gear box 54. Communicating air holes (not shown)
is provided. In addition, the front plate 84 of the gear box 54
and an air exhaust hole 85 in the peripheral wall of the vertical arm 55,
86 are provided. Although not shown, one end of an air hose is connected to a portion of the horizontal arm 47 located inside the rotating tower 31, and the other end of the air hose is connected to the elevating member 3 of the air hose held by the cable carrier 42.
It is connected to the tip of the 7 side. Another air hose is passed through the cylinder 17 of the fixed base 14, and one end of this hose is connected to the tip of the cable carrier 42 on the swirling tower 31 side, and the other end is connected to a pipe joint attached to the side plate 87 of the fixed base 14. are connected to the inside of each.
Further, another air hose connected to a cooling air source is connected to the outside of this pipe joint. Hydraulic hoses 88, 89 for hydraulic cylinder 39
Similarly, it passes through the inside of the cylinder 17 and is led out from the fixed base 14. Also, the ladle tilting motor 7
The electric wires of the angle detector 7 and the angle detector 79 are also led out from the fixed base 14 in the same way as the air hose.
In order to protect these hoses and electric wires, rubber rings 90 are fixed to both end surfaces of the cylinder 17, and a rubber cylinder 91 fitted into the inner surface of the cylinder 17 is attached.
are held in place by upper and lower rings 90.

The above-mentioned pouring device 6 automatically pours molten metal into the mold 2 moving to the pouring position 7 of the upper conveyor 3 in the following manner.

That is, first, the empty ladle 12 in the horizontal state is
At the upper end position, rotate the melting furnace 5 to above it, tilt it slightly so that the spout 11 is at the top, and then turn the furnace 5.
The robot moves downward and stops at the lower end position. This results in
The ladle 12 is immersed in the molten metal in the furnace 5, and the ladle 12 is filled with the molten metal. Next, the ladle 12 rises to a position slightly above the hot water level L in the furnace 5, and returns to a horizontal state at this position. As a result, the ladle 12 has
A certain amount of molten metal remains depending on the slope when rising from the molten metal level L. At this time, the inclination of the ladle 12, that is, the amount of molten metal put into the ladle 12, is set in the control device according to the type of casting. When the ladle 12 is submerged in the molten metal, the molten metal below the molten metal surface L enters the ladle 12 through the hole 64 of the ladle bottom wall 63 and the cylindrical part 65, so that it floats on the molten metal surface L. There is little risk of slag getting into the ladle 12. In addition, since the spout 11 is placed upward when the ladle 12 is tilted, there is no fear of dirt remaining on the spout 11.

A ladle 12 made horizontal by pouring a certain amount of molten metal into it
further rises to the upper end position above the furnace 5, and then turns to above the pouring position 7 of the upper conveyor 3. By this time, the mold 2 has moved to the pouring position 7 and has stopped, and the ladle 12 is placed at the pouring spout 11.
is stopped above the mold 2 so that it is located slightly above the rear of the sprue 92 (see FIG. 7). Then, with the ladle transporting member 8 stopped, the ladle 12 is tilted as shown by the chain line in FIG. At this time, since the ladle 12 is tilted about the central axis C of the ladle support member 10 slightly behind the spout 11, the position of the spout 11 hardly changes. Therefore, the molten metal can be reliably poured into the mold 2 without making the sprue 92 particularly large.

After pouring, the ladle 12 returns to a horizontal state and then rotates again to the top of the melting furnace 5. At the same time, the mold 2 after pouring is moved forward by the upper conveyor 3 and placed in the next mold. 2 moves to pouring position 7.
By repeating these actions,
Molten metal is poured into the molds 2 which are successively moved to the pouring position 7. Note that during pouring work, cooling air is supplied into the horizontal arm 47 by an air hose, and this air is supplied from inside the horizontal arm 47 to the gear box 54.
It flows into the interior and vertical arms 55 to cool them, and is discharged to the outside through discharge holes 85 and 86.

Ladle transport device 9, ladle support member 10, ladle 12
The configuration of the ladle tilting device 13 is not limited to that of the above embodiment, and can be modified as appropriate. for example,
The ladle transport device may be of a type that moves the ladle back and forth in a straight line instead of rotating it.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway side view showing a part of the casting equipment, FIG. 2 is a plan view of the same, and FIG. 3 is a partially cutaway side view of an automatic pouring device. Figure 4 is a cutaway rear view of the same part, and Figure 5 is a rear view of the same part.
Figure - Enlarged sectional view of the line, Figure 6 is Figure 3 -
FIG. 7 is a partially cutaway side view showing an enlarged portion of the ladle of the automatic pouring device, and FIG. 8 is a cross-sectional view taken along the line in FIG. 7. 2... Mold, 5... Melting furnace, 6... Automatic pouring device, 8... Ladle transporting member, 9... Ladle transporting device,
10... Ladle support member, 11... Spout, 12...
... Ladle, 13 ... Ladle tilting device, 55 ... Vertical arm, 58 ... Guide roller, 59 ... Annular groove, 60 ... Gear, 62 ... Teeth, C ... Horizontal axis.

Claims (1)

[Claims] 1. A ladle that moves the ladle carrying member 8 fixed to the lower end of the vertical arm 55 between the upper part of the melting furnace 5 and the upper part of the mold 2, and also moves it up and down above the melting furnace 5. a conveying device 9; two horizontal guide rollers 58 attached to the lower part of the ladle conveying member 8 parallel to each other and having an annular groove 59 formed on the outer peripheral surface; A gear 60 attached to the ladle carrying member 8 has an arc shape centered on a horizontal axis C parallel to the guide rollers 58 below the ladle carrying member 8, and the inner circumference is above the annular groove 59 of the two guide rollers 58. The ladle support member 10 is passed between the gear and the guide roller 58 so that the teeth 62 formed on the outer peripheral surface of the gear engage with the lower part of the gear 60, and the spout 11 is located near the horizontal axis C. a ladle 12 fixed to a ladle support member 10 so as to rotate the ladle support member 10, and a ladle tilting device 13 that tilts the ladle 12 by rotating a gear 60 and moving the ladle support member 10 in the circumferential direction. Automatic pouring equipment in casting equipment.