JP6276698B2 - Sampling apparatus, sampling method and material management method for molten metal poured into mold - Google Patents

Description

  The present invention relates to an apparatus and a sampling method for sampling a molten metal poured into a mold, that is, a molten metal in a ladle, in order to control the material of the molten metal poured into the mold in a casting factory. The present invention also relates to a material management method for molten metal poured into the mold.

  Conventionally, when a molten metal is poured into a mold in a casting factory that manufactures a cast product, the molten metal is sampled and the molten material is maintained and managed in order to inspect the material and physical characteristics of the molten metal. In the sampling of the molten metal for the material management, it is common for an operator to scoop the molten metal with a ladle or a sampling jig during the pouring operation (see, for example, Patent Document 1). In addition, as another method for sampling the molten metal, simultaneously with pouring into the mold, a test piece that is continuous with the product in the mold or the casting method is cast, and after the molten metal is solidified, the test piece is collected and cut to break the fracture surface. There was a method of performing inspection (see, for example, Patent Document 2).

Japanese Utility Model Publication 2-16058 JP-A-3-42172

  However, in the pouring work, the sampling method in which the worker scoops the molten metal with a ladle or a sampling jig has a problem that the worker has to work near the hot molten metal, which is dangerous. . Furthermore, since this is a human work, there is a problem that sampling may be forgotten. In addition, in the method of casting a test piece continuous to the product or casting method in the mold at the same time as pouring into the mold, and collecting the test piece after solidification of the molten metal and cutting it, Because the test piece was made in the past, there was a problem that the yield was poor.

  In this technical field, there is a demand for a sampling device and a sampling method for molten metal that is not dangerous and that can reliably sample molten metal in a pouring ladle unit and that can improve the yield, and that pours into a mold. Yes. In addition, there is a demand for a material management method for the molten metal poured into the mold.

  A molten metal sampling apparatus for pouring into a mold according to one aspect of the present invention is a sampling apparatus that is mounted on an automatic pouring apparatus for pouring molten metal in a ladle into a mold and samples the molten metal in the ladle. A hot water receiving container, a movable frame to which the hot water receiving container is mounted, and a drive unit that drives the movable frame to convey the hot water receiving container to the hot water receiving position for receiving the molten metal from the ladle. It is characterized by comprising.

  According to another aspect of the present invention, a molten metal sampling method for pouring into a mold is mounted on an automatic pouring apparatus for pouring molten metal in a ladle into a mold, and a sampling device for sampling the molten metal in the ladle. A sampling method for sampling the molten metal in the ladle, a conveying step of conveying the hot water receiving container from the ladle to the hot water receiving position for receiving the molten metal, and a part of the molten metal in the ladle, The hot water receiving container has a hot water receiving process for receiving hot water at the hot water receiving position, and an unloading process for unloading the hot water receiving container from the hot water receiving position.

  In one form, in the method for sampling molten metal to be poured into the mold described above, a predetermined amount of molten metal is replenished each time the ladle is replaced or the empty ladle is replaced in the conveying step, the hot water receiving step and the unloading step. Each time, it may be performed at least once.

  In one aspect, in the above-described method for sampling molten metal poured into a mold, the conveyance process, the hot water receiving process, and the unloading process are performed after a predetermined number of times of pouring the mold into the mold using an automatic pouring device, and then the remaining in the ladle It may be performed when the weight of the molten metal becomes equal to or less than a predetermined set weight value.

  According to another aspect of the present invention, there is provided a material management method for a molten metal poured into a mold, wherein sampling information when the molten metal is sampled is stored in a storage unit by the molten metal sampling method poured into the mold. In addition, it is characterized in that it is associated with pouring information relating to the automatic pouring device, mold information relating to the mold, or melting information relating to the molten metal.

  According to various aspects and various embodiments of the present invention, it is not dangerous, and it is possible to reliably sample a molten metal in a pouring ladle unit and to melt the molten metal to be poured into a mold that can improve the yield. A sampling device, a sampling method, and a material management method are provided.

It is a front view of the automatic pouring device concerning one embodiment. It is a right view of FIG. It is a block diagram for demonstrating control of sampling of a molten metal.

  Hereinafter, embodiments will be described in detail with reference to the drawings. FIG. 1 is a front view showing an automatic pouring apparatus according to an embodiment. FIG. 2 is a side view of the automatic pouring apparatus shown in FIG. For convenience of explanation, a description will be given assuming that a conveyance direction of a mold M, which will be described later, is a Y direction, a vertical direction is a Z direction, and a direction perpendicular to the Y direction and the Z direction is an X direction. As shown in FIG. 1, a pair of rails L is provided on the floor surface along the Y direction. From the molding line (not shown), the mold M is conveyed along the rail L by a mold conveying means (not shown). On the rail L, for example, a plurality of molds M are arranged at intervals of one pitch (one mold), and the plurality of molds M are intermittently conveyed along the Y direction as a mold group.

  An automatic pouring device 1 is disposed outside the rail L. The automatic pouring device 1 includes a ladle 2, and the ladle 2 can be tilted around a tilting shaft 3 extending in the Y direction. The ladle 2 is provided with a tapping nozzle 2a. When the ladle 2 tilts about the tilting shaft 3, the molten metal in the ladle 2 is discharged from the tapping nozzle 2 a of the tilted ladle 2. That is, the tip position of the pouring nozzle 2a during pouring is the pouring position. Moreover, the automatic pouring apparatus 1 is provided with the raising / lowering apparatus (detailed structure is abbreviate | omitted), and this ladle 2 is comprised so that raising / lowering to a Z direction is possible by this raising / lowering apparatus. Moreover, the automatic pouring apparatus 1 is provided with the moving apparatus (detailed structure is abbreviate | omitted), and the ladle 2 is comprised so that a movement in the X direction is possible by this moving apparatus. Further, the automatic pouring device 1 can be moved by a traveling carriage 4 in the moving direction of the mold M and the opposite direction, that is, the Y direction. The weight of the molten metal in the ladle 2 can be measured with a load cell (not shown).

  The automatic pouring device 1 is equipped with a sampling device 5 for sampling the molten metal in the ladle 2. Here, the sampling device 5 will be described. The sampling device 5 according to an embodiment includes a hot water receiving container 6, a movable frame 7, and a motor 8.

  The hot water receiving container 6 is used to receive molten metal to be sampled from the ladle 2. As shown in FIG. 1, the hot water receiving container 6 is detachably attached to the tip of the movable frame 7. The base end of the movable frame 7 is connected to the drive shaft 8 a of the motor 8. The motor 8 is used as a drive unit that drives the movable frame 7 and transports the hot water receiving container 6 to the hot water receiving position for receiving the molten metal from the ladle 2. By driving the motor 8, the hot water receiving container 6 rotates on the YZ plane around the drive shaft 8a of the motor 8 via the movable frame 7 and is moved in the vertical direction (see FIG. 2). The hot water receiving container 6 is attached to the tip of the movable frame 7 so as to be always kept horizontal by its own weight even when the movable frame 7 rotates.

  Operation | movement of the automatic pouring apparatus 1 comprised in this way is demonstrated. First, a mold M is intermittently conveyed by one pitch (one mold) in a mold group state from a molding line (not shown) by a mold conveying means (not shown). Next, the ladle 2 is tilted in the forward direction (the pouring direction) about the tilting shaft 3, and the molten metal in the ladle 2 is poured into a predetermined mold M in the mold group. Then, the ladle 2 is tilted in the reverse direction (direction in which the hot water is cut) around the tilting shaft 3, and the ladle 2 is returned to the horizontal state. Thereafter, as described above, the mold M is intermittently conveyed by one pitch, and the molten metal is poured into the next mold M. In this way, the molten metal is poured into each of the molds M that are intermittently conveyed.

  During the pouring of each mold M described above, the molten metal in the ladle 2 is sampled. Here, the operation of sampling the molten metal will be described. First, by positively operating the motor 8, the hot water receiving container 6 is rotated in the forward direction via the movable frame 7, and the hot water receiving container 6 is conveyed from the ladle 2 to the hot water receiving position where the molten metal is received. (Conveying process). The hot water receiving position may be any position above the mold M as long as the hot water receiving container 6 can receive the molten metal from the ladle 2, but in the present embodiment, above the pouring gate in the mold M. The hot water receiving container 6 is in a position where the molten metal can be received from the hot water nozzle 2 a of the ladle 2. That is, in one embodiment, the hot water receiving position is a position between the mold M and the ladle 2 in the height direction, and more specifically, a position above the mold M and at the time of pouring. It can be set as the position below the front-end | tip (hot water position) of the hot water nozzle 2a.

  Next, by tilting the ladle 2 in the forward direction, a part of the molten metal in the ladle 2 is received by the hot water receiving container 6 at the hot water receiving position (hot water receiving step). Thereafter, the ladle 2 is tilted in the reverse direction to return the ladle 2 to a horizontal state. Next, by reversely operating the motor 8, the hot water receiving container 6 is rotated in the reverse direction via the movable frame 7, and the hot water receiving container 6 is unloaded from the hot water receiving position (unloading step).

  Thereafter, the hot water receiving container 6 carried out from the hot water receiving position is removed from the tip of the movable frame 7 by a hot water receiving container attaching / detaching device (not shown). An empty hot water receiving container 6 is attached to the tip of the movable frame 7 by the hot water receiving container attaching / detaching device (not shown). The hot water receiving container 6 removed from the tip of the movable frame 7 is taken out when the molten metal is solidified, and the removed one becomes a test piece. In this way, the molten metal is sampled.

  As long as the molten metal is sampled during the pouring of each mold M described above, the timing, the number of times, etc. are not particularly limited. For example, the molten metal may be sampled at least once every time the ladle 2 is replaced or every time a predetermined amount of molten metal is replenished to the empty ladle 2.

  This point will be described in detail. The ladle 2 normally stores an amount of molten metal that can be poured into the mold M a plurality of times. And when the pouring of the predetermined number of times is performed by the ladle 2, the ladle 2 becomes almost empty. Then, in the automatic pouring device 1, the empty ladle 2 and the ladle 2 filled with a predetermined amount of molten metal are exchanged. Each time the ladle 2 is replaced, the molten metal is sampled once. If it does so, the said test piece will be obtained for every ladle 2. FIG.

  Further, in the automatic pouring apparatus 1, when the ladle 2 is not replaced, that is, when the ladle 2 is almost empty, an embodiment in which a predetermined amount of molten metal is replenished to the ladle 2 by a molten metal supply means (not shown). In this case, every time the empty ladle 2 is replenished with a predetermined amount of molten metal, the molten metal is sampled once. If it does so, the said test piece will be obtained whenever the predetermined amount of molten metal is replenished to the ladle 2 which became empty. This is substantially the same as obtaining the test piece for each ladle 2.

  In addition, in the sampling method of the molten metal which concerns on one Embodiment, it understands also administratively to carry out once in the period until the ladle 2 is replaced | exchanged as mentioned above or the molten metal is replenished to the ladle 2. Although it seems easy, the number of times of sampling of the molten metal is not limited to one, and the molten metal may be sampled a plurality of times.

  As described above, the sampling of the molten metal is performed at least once every time the ladle 2 is replaced or every time when the empty ladle 2 is replenished with a predetermined amount of molten metal. There is an effect that it is possible to reliably obtain the test piece and to easily manage the molten metal in two ladle units.

  In another embodiment, the weight of the remaining molten metal in the ladle 2 is determined in advance after sampling the molten metal from the automatic pouring device 1 to the mold M a predetermined number of times. You may make it perform when it becomes below a setting weight value.

  This point will be described in detail. In this case, the set weight value of the molten metal in the ladle 2 is determined in advance. And if pouring by the ladle 2 is repeated, the weight of the molten metal in the ladle 2 will decrease gradually. Then, after several times of pouring, the weight of the molten metal in the ladle 2 becomes equal to or less than the set weight value. Then, the molten metal is sampled once before the next pouring. Even if it does in this way, the said test piece is obtained for every ladle 2 substantially. The sampling of the molten metal is not limited to the one time, and may be performed a plurality of times after the weight of the molten metal in the ladle 2 becomes equal to or less than the set weight value.

  Thus, after sampling the molten metal from the automatic pouring device 1 to the mold M a predetermined number of times, the weight of the remaining molten metal in the ladle 2 becomes equal to or less than a predetermined set weight value. Even if it carries out at the time, the said test piece is obtained reliably for every ladle 2, and there exists an effect that it becomes easy to manage molten metal per ladle 2 unit. Moreover, when performing sampling of this molten metal, there also exists an effect that it can prevent that it will be in the state where the remaining molten metal in the ladle 2 is insufficient.

  Next, the point of the sampling control of the molten metal in the ladle 2 described above will be described in detail. Here, after the predetermined number of times of pouring from the automatic pouring device 1 to the mold M, the weight of the molten metal in the ladle 2 falls below a predetermined set weight value. An example of control when performing sampling will be described.

  In one embodiment, the automatic pouring device 1 may further include a control unit S. The control unit S is mainly configured by a computer including a CPU, a ROM, and a RAM, for example, and a computer program for realizing a predetermined function is stored in the ROM or the like. And the function mentioned later is implement | achieved by reading said computer program on CPU and RAM, and making it operate | move under control of CPU. In one embodiment, each function of control part S may be realized by an electric circuit.

  FIG. 3 is a block diagram illustrating a functional configuration of the control unit S. As illustrated in FIG. The control unit S includes an automatic pouring device control unit S1 and a molten metal sampling control unit S2. The automatic pouring device control unit S1 includes a pouring machine attitude control unit S5, a pouring amount measurement control unit S6, and a sampling information storage unit S7. The molten metal sampling control unit S2 includes a sampling start instruction unit S3, a motor drive instruction unit S4, and a set weight value storage unit S8.

  The automatic pouring device 1 according to an embodiment may further include a load cell LC and a position detector 9. The load cell LC is a device that measures the weight of the molten metal in the ladle 2. An example of the position detector 9 is an encoder. The position of the hot water receiving container 6 can be controlled by rotating the movable frame 7 based on the value of the position detector 9.

  When the pouring by the ladle 2 is repeated, the weight of the molten metal in the ladle 2 gradually decreases. At this time, the weight of the molten metal in the ladle 2 is measured by the load cell LC. The weight of the molten metal in the ladle 2 measured by the load cell LC is output to the sampling start instruction unit S3. And if it finishes pouring several times and it determines with the weight of the molten metal in this ladle 2 becoming below the setting weight value memorize | stored in setting weight value memory | storage part S8, sampling start instruction | indication part S3 will start sampling Is output to the motor drive instruction unit S4.

  The motor drive instruction unit S4 outputs a signal instructing the motor 8 to start driving. Then, the motor 8 is operated normally. By the normal operation of the motor 8, the hot water receiving container 6 is rotated in the forward direction via the movable frame 7, and the hot water receiving container 6 is conveyed from the ladle 2 to the hot water receiving position where the molten metal is received. Since the position of the hot water receiving container 6 is measured by the position detector 9, the hot water receiving container 6 can be stopped at the hot water receiving position.

  Next, the pouring machine attitude control unit S <b> 5 sets the ladle 2 of the automatic pouring apparatus 1 to an attitude capable of pouring the hot water receiving container 6. In order to make the ladle 2 in such a posture, the ladle 2 is tilted, the ladle 2 is moved in the vertical direction, the ladle 2 is moved in the front-rear direction, the traveling direction of the mold M of the traveling carriage 4 or the opposite direction. The necessary operation is appropriately selected from the four movements, and the operation is performed. There may be a minimum of one operation or a maximum of four operations.

  Thereafter, the hot water pouring vessel attitude control unit S5 and the pouring amount measurement control unit S6 pour the hot water receiving container 6 until the hot water receiving container 6 is filled with a predetermined amount of molten metal. Thereafter, the motor 8 is reversely operated, whereby the hot water receiving container 6 is rotated in the reverse direction via the movable frame 7, and the hot water receiving container 6 is carried out from the hot water receiving position.

  And when the molten metal in the hot water receiving container 6 is solidified, the contents are taken out, and the taken out one becomes a test piece. In addition, although this test piece is obtained as a result of sampling the molten metal, the process of obtaining the test piece, that is, sampling information when the molten metal is sampled is stored in the sampling information storage unit S7. To do. The sampling information is, for example, information for identifying a test piece, and specifically includes a sample number (test piece number), a sampling time, the number of a ladle that has sampled the molten metal, and the like.

  In the material management method according to the embodiment, the sampling information stored in the sampling information storage unit S7 can be associated with other information. Examples of the other information include pouring information related to the automatic pouring device, mold information related to the mold, melting information related to the molten metal, and the like. Furthermore, the pouring information related to the automatic pouring apparatus is information indicating, for example, conditions during pouring, and specifically includes the pouring weight, the number of pouring, the pouring temperature, and the like. The mold information related to the mold is, for example, information related to the mold, and specifically includes a molding time, a planned pouring material, a product number, and the like. In addition, the melting information related to the molten metal is, for example, information related to the molten metal, and specifically includes the hot water time, the hot water temperature, the amount of alloy addition, and the like.

  In this way, the sampling information when the molten metal is sampled is stored in the sampling information storage unit S7, and the molten metal information related to the automatic pouring apparatus, the mold information related to the mold, or the molten metal is stored. There is an advantage that traceability is improved by associating with related dissolution information.

  The other information associated with the sampling information stored in the sampling information storage unit S7 is any one of pouring information related to the automatic pouring device, mold information related to the mold, and melting information related to the molten metal. However, the present invention is not limited to this, and all these three pieces of information may be associated with the sampling information.

  The automatic pouring device 1 described above is equipped with a molten metal sampling device 5. For this reason, the molten metal in the ladle 2 can be sampled automatically, and there is an effect that there is no dangerous work by a person. Also, since the molten metal is sampled automatically, you will never forget to sample. For this reason, there exists an effect that a molten metal can be sampled reliably for every pouring ladle. Furthermore, in the automatic pouring device 1, the molten metal in the ladle 2 is automatically sampled at an appropriate timing, so that test pieces are not made on all molds. For this reason, the number of test pieces to be produced can be greatly reduced, and the yield can be improved.

DESCRIPTION OF SYMBOLS 1 ... Automatic pouring device, 2 ... Ladle, 2a ... Outlet nozzle, 5 ... Sampling device, 6 ... Hot water receiving container, 7 ... Movable frame, 8 ... Drive part, M ... Mold, S ... Control part.

Claims (5)

A sampling device that is mounted on an automatic pouring device for pouring molten metal in a ladle into a mold, and samples the molten metal in the ladle,
A hot water container,
A movable frame on which the hot water receiving container is mounted;
The drives the movable frame, a upper position of the mold, driven to convey the受湯container molten metal to be poured into the mold from the ladle to受湯position is受湯possible position And
A molten metal sampling apparatus for pouring a molten metal into a mold. A sampling method for sampling the molten metal in the ladle by a sampling device that is mounted on an automatic pouring device for pouring the molten metal in the ladle into the mold, and sampling the molten metal in the ladle,
The受湯container, a upper position of the mold, a transporting step for transporting the molten metal to be poured into the mold from the ladle to受湯position is受湯possible position,
A hot water receiving step in which a part of the molten metal in the ladle is received by the hot water receiving container at the hot water receiving position;
An unloading step of unloading the hot water receiving container from the hot water receiving position;
A molten metal sampling method for pouring a molten metal into a mold. In the sampling method of the molten metal poured into the mold according to claim 2,
The conveying step, the hot water receiving step, and the unloading step are performed at least once every time the ladle is replaced or every time a predetermined amount of molten metal is replenished to the empty ladle. , Sampling method of molten metal poured into the mold. In the sampling method of the molten metal poured into the mold according to claim 2,
After carrying out the pouring to the mold by the automatic pouring device a predetermined number of times in the conveying step, the hot water receiving step and the unloading step, the weight of the remaining molten metal in the ladle is set in advance. A method for sampling a molten metal to be poured into a mold, which is performed when the value falls below a value. Sampling information when the molten metal is sampled is stored in a storage unit according to the molten metal sampling method for pouring the molten metal into the mold according to claim 2, and the pouring information relating to the automatic pouring apparatus, the mold A material management method for pouring molten metal into a mold, characterized in that it is associated with mold information relating to the molten metal or melting information relating to the molten metal.

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