WO2014077021A1

WO2014077021A1 - Test piece sampling method, test piece data management method, and test piece model

Info

Publication number: WO2014077021A1
Application number: PCT/JP2013/074398
Authority: WO
Inventors: 西田　理
Original assignee: 新東工業株式会社; 藤和電気株式会社
Priority date: 2012-11-15
Filing date: 2013-09-10
Publication date: 2014-05-22
Also published as: CN104936726B; JPWO2014077021A1; CN104936726A; JP6209165B2

Abstract

In one embodiment of this test piece sampling method, the method samples, as a test piece, molten metal in a ladle in an automatic pouring device that pours molten metal in the ladle into a mold, and the method has: a step for pouring molten metal in ladle units into a test piece cavity formed at the upper surface of the mold; and, after the molten metal poured into the test piece cavity has cooled to form a test piece, a step for removing and sampling the test piece from the mold, which is being conveyed together with the test piece.

Description

Specimen collection method, specimen data management method and specimen model

The present invention relates to a method for collecting, as a test piece, a molten metal to be poured into a mold, that is, a molten metal in a ladle, in order to control the material of the molten metal to be poured into the mold in a casting factory. The present invention also relates to a data management method for the collected specimen, and further to a specimen model for creating a specimen cavity for casting the specimen.

Conventionally, when a molten metal is poured into a mold in a casting factory that manufactures a cast product, the molten metal is collected as a test piece in order to inspect the material and physical characteristics of the molten metal, and the molten material is maintained and managed. In the molten metal specimen collection for 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 collecting a test piece of molten metal, a test piece continuous to a product or a casting method in the mold is poured at the same time as pouring into the mold, and the test piece is taken and cut after solidification of the molten metal. There has been a method of performing a fracture surface inspection (see, for example, Patent Document 2).

Japanese Utility Model Publication 2-16058 Japanese Patent Laid-Open No. 3-42172

However, the test piece sampling method in which the operator scoops the molten metal with a ladle or a sampling jig during the pouring work requires that the operator must work near the hot molten metal, which is dangerous. there were. Furthermore, since it is a human work, there is a problem that the test piece 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, collecting the test piece after solidification of the molten metal, cutting it, and performing the fracture surface inspection, Because the test piece was made in the past, there was a problem that the yield was poor.

For this reason, in this technical field, it is not dangerous, and it is possible to reliably collect molten metal as a test piece in a pouring ladle unit, and to collect a molten metal test piece that is poured into a mold that can improve the yield. A method is desired. There is also a demand for a method for managing the test piece data of the molten metal poured into the mold. Furthermore, a specimen model for producing a specimen cavity for casting the specimen is desired.

A test piece collecting method for molten metal poured into a mold according to one aspect of the present invention is a test piece for collecting molten metal in a ladle as a test piece in an automatic pouring apparatus for pouring molten metal in a ladle into a mold. A sampling method, in which a molten metal is poured into a test piece cavity formed on the upper surface of a mold in a ladle unit, and after the molten metal poured into the test piece cavity is cooled to become a test piece, a test is performed. And taking out the test piece from the mold conveyed with the piece.

In one embodiment, in the step of taking out and collecting the test piece, the molten metal poured into the test piece cavity is cooled to become a test piece, and the mold conveyed together with the test piece is placed in the mold separating apparatus. The test piece may be taken out from the mold and collected before being carried into the container.

In one embodiment, the step of pouring the molten metal in a ladle unit into the test piece cavity formed on the upper surface of the mold, when the weight of the remaining molten metal in the ladle is equal to or less than a predetermined set weight value You may go.

In one embodiment, a step of detecting the presence or absence of the test piece of the mold to be conveyed may be further included before the step of taking out and collecting the test piece from the mold.

A test piece data management method according to another aspect of the present invention is a data management method for a test piece collected by the above-described test piece collection method, and is provided in a ladle unit in a test piece cavity formed on an upper surface of a mold. When pouring the molten metal, at a predetermined timing, information on pouring the test piece relating to the pouring of the test piece, molding information relating to the molding of the mold, pouring information relating to the automatic pouring device, and melting relating to the molten metal Information is collected, and the test piece pouring information, molding information, pouring information and melting information are associated with each other and stored.

The test piece model according to another aspect of the present invention forms a test piece cavity for casting a test piece used in the above-described test piece collecting method. This test piece model may be fixed to a squeeze member in a mold making machine. Moreover, this test piece model may exhibit the shape of a square pole or a cylinder.

According to various aspects and various embodiments of the present invention, pouring into a mold that is not dangerous and can reliably collect a molten metal as a test piece in a pouring ladle unit and improve the yield. A molten metal test piece collecting method, a test piece data management method, and a test piece model are provided.

It is a top view which shows the test piece sampling method which concerns on one Embodiment. FIG. 2 is an AA arrow view in FIG. 1. It is a figure which shows the detail of a casting_mold | template, Comprising: (a) is a top view, (b) is a front view. It is a top view which shows the range wider than FIG. It is a block diagram for demonstrating the control in the test piece sampling method which concerns on one Embodiment. It is a schematic diagram showing a part in a mold making machine immediately after molding an upper mold.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present embodiment, the test piece collecting method according to one embodiment will be described by applying it to pouring a mold formed by a mold making machine with a horizontal split frame. FIG. 1 is a plan view showing a specimen collection method according to an embodiment. FIG. 2 is an AA arrow view 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, in this embodiment, a plurality of molds M are transported in a continuous mold group state.

And, the automatic pouring device 1 is disposed outside the mold M. Here, the automatic pouring apparatus 1 will be described. A rail 2 is disposed on the floor surface outside the mold M, and the traveling direction of the mold M (in the direction of arrow Y1 in FIG. 1) and the opposite direction, that is, the Y direction are arranged on the rail 2. A movable carriage 3 is mounted. The traveling carriage 3 travels on the rail 2 by operating a traveling drive motor 3a.

On the traveling carriage 3, a back-and-forth moving carriage 4 (see FIG. 2) capable of moving a ladle 9 described later along the X direction orthogonal to the traveling direction of the mold M is installed. The front / rear moving carriage 4 is moved along the X direction by operating the front / rear drive motor 4a. And on the back-and-forth moving carriage 4, elevating means 5 for elevating the ladle 9 along the Z direction is erected. The ladle 9 is moved up and down along the Z direction by operating a lifting drive motor 5 a in the lifting means 5.

A tilting shaft unit 6 (see FIG. 2) having a built-in tilting shaft (not shown) is mounted on the lifting means 5 so as to be able to move up and down. A tilting frame 7 is attached to the tip of the tilting shaft unit 6. It is connected so that it can tilt. A tilt drive motor 8 is mounted on the tilt shaft unit 6, and the tilt frame 7 is tilted about the tilt axis T by operating the tilt drive motor 8. The ladle tilting means for tilting the ladle 9 includes the tilt shaft unit 6, the tilt frame 7, and the tilt drive motor 8.

The ladle 9 is detachably fixed to the tilting frame 7. In addition, a control device 10 of the automatic pouring device 1 is provided upright at one upper end of the traveling carriage 3. The traveling carriage 3 is equipped with a load cell (not shown) as a weight measuring means.

FIG. 3 shows details of the mold M conveyed in a continuous mold group state. 3A is a plan view of the mold M, and FIG. 3B is a front view of the mold M. As shown in FIG. 3, the mold M is composed of an upper mold M1 and a lower mold M2, and the upper mold M1 and the lower mold M2 are held by an upper casting frame W1 and a lower casting frame W2, respectively. The mold M is placed on the surface plate J and conveyed.

As shown in FIG. 3B, the mold M is formed with a product cavity Mc which is a hollow portion for forming a product. A test piece cavity Ma into which a molten metal for producing a test piece is poured is formed on the upper surface of the upper mold M1. A symbol Mb is a gate that communicates with the product cavity Mc. In the upper mold M1, the test piece cavity Ma and the gate Mb are formed at different positions of the upper mold M1. The test piece cavity Ma is discontinuous with respect to the product cavity Mc.

The test piece cavity Ma is formed when the upper mold M1 is formed. Hereinafter, a method for forming the test piece cavity Ma will be described in detail with reference to FIG. FIG. 6 is a schematic view showing a part of a mold making machine (a mold making machine with a horizontal split frame) immediately after forming the upper mold M1. As shown in FIG. 6, the mold making machine is provided with a flat plate-like squeeze member SB for squeezing foundry sand filled in the upper casting frame W1. The squeeze member SB is connected to a lifting cylinder (not shown). A test piece model SM is fixed to the lower surface of the squeeze member SB. The shape of the test piece model SM is a quadrangular prism in this embodiment. When forming the upper mold M1, the squeeze member SB is lowered by the operation of the lifting cylinder (not shown), and the foundry sand filled in the upper casting frame W1 is squeezed (compressed). When this squeeze is completed, a test piece cavity Ma corresponding to the shape of the test piece model SM is formed on the upper surface of the upper mold M1.

FIG. 4 is a plan view showing a wider range than FIG. 1 and shows the entire configuration of the casting system. As shown in FIG. 4, the mold M transported in the above-described continuous mold group state is unloaded from the horizontal split frame mold making machine 11 disposed at one end and the mold separation disposed at the other end. It is carried into the device 12. The mold M is continuously present between the horizontal split frame-equipped mold making machine 11 and the mold separating apparatus 12, but the illustration of the mold M is partially omitted in FIG. 4.

A test piece take-out device 13 for taking out a test piece from the mold M before the mold M is carried into the mold release device 12 is disposed on the outside (upstream side) of the mold release device 12. ing. Reference numeral 14 denotes a control device for the entire casting system. Reference symbol R indicates a pouring region, that is, a range in which the traveling carriage 3 is movable in the automatic pouring device 1.

The operation of what is configured in this way will be described. First, a mold group of the mold M is intermittently conveyed in the direction of the arrow Y1 by one pitch (one mold) by a mold conveyance unit (not shown). Thereby, the casting_mold | template M which should be poured is conveyed by the front of the ladle 9 in the automatic pouring apparatus 1. FIG.

Next, the ladle 9 is tilted in the direction in which the automatic pouring device 1 pours the molten metal, and the molten metal in the ladle 9 is poured into a predetermined mold M. The molten metal is poured from the gate Mb of the mold M into the product cavity Mc. At this time, the automatic pouring device 1 not only operates the tilt drive motor 8, but also operates the front-rear drive motor 4a and the lift drive motor 5a simultaneously. Next, when the pouring weight to the mold M reaches the set weight, the automatic pouring device 1 tilts the ladle 9 in the direction of draining the molten metal by reversely operating the tilt drive motor 8, The hot water is drained to complete the pouring.

Thereafter, as described above, the mold M is intermittently conveyed by one pitch, and the molten metal is poured into the product cavity Mc of the next mold M. In this way, the molten metal is poured into each of the molds M that are intermittently conveyed.

Moreover, in the test piece collection method according to the embodiment, the molten metal is poured into the test piece cavities Ma of at least some of the molds M among the plurality of molds M transported as a mold group by the automatic pouring device 1. The The pouring of the mold M into the test piece cavity Ma is performed in a ladle unit during the pouring of each mold M described above. In addition, in the test piece sampling method according to an embodiment, when the molten metal is poured into the test piece cavity Ma in a ladle unit, a predetermined amount of molten metal is added to the empty ladle 9 every time the ladle 9 is replaced. It means that the molten metal is poured into the test piece cavity Ma every time it is replenished. That is, in the test piece collection method according to the embodiment, the molten metal in the ladle 9 is poured into the test piece cavity Ma of at least one mold M.

In one embodiment, after pouring the mold M by the automatic pouring device 1 a predetermined number of times, the weight of the remaining molten metal in the ladle 9 is set to a predetermined weight value (test piece pouring described later) When the temperature becomes equal to or less than (starting weight setting value), the molten metal may be poured into the test piece cavity Ma of the predetermined upper mold M1.

This point will be described in detail. In this case, the set weight value of the molten metal in the ladle 9 is determined in advance. And if the pouring by the ladle 9 is repeated, the weight of the molten metal in the ladle 9 will gradually decrease. And when the pouring of the several times is finished, the weight of the molten metal in this ladle 9 will be below this set weight value. Then, before pouring into the spout Mb of the next mold M, the molten metal is poured into the test piece cavity Ma of the predetermined upper mold M1. If it does in this way, a test piece will be obtained for every ladle 9 substantially. The automatic pouring device 1 may pour the molten metal in the ladle 9 only once when the weight of the molten metal in the ladle 9 is equal to or less than the set weight value. After the weight becomes equal to or less than the set weight value, the hot water may be poured into the test piece cavity Ma a plurality of times. Further, in the case of pouring into the test piece cavity Ma, the ladle 9 is tilted and poured as in the case of pouring into the pouring gate Mb of the mold M.

In FIG. 4, blackened portions of the gate Mb and the test piece cavity Ma indicate that the molten metal has been poured from the ladle 9. Reference symbol S indicates a poured test piece. After the molten metal poured into the test piece cavity Ma is cooled to become the test piece S, before the mold M conveyed together with the test piece S is carried into the mold separating device 12, it is used together with the test piece S. The test piece S is taken out from the transported mold M and collected.

More specifically, in one embodiment, when the mold M transported together with the test piece S is in a position before it is carried into the mold separating apparatus 12 (one mold before), the test piece take-out apparatus 13 performs the mold M. The test piece S can be taken out from the sample and collected. Note that the mold M carried into the mold separating device 12 by intermittent conveyance of the mold group is extracted from the upper and lower casting frames W1 and W2 by the mold separating device 12 from the upper and lower casting molds W1 and W2. It is. The upper and lower casting frames W1 and W2 and the upper and lower molds M1 and M2 are each conveyed to a subsequent process (not shown).

Next, the above-described control points for specimen collection will be described in detail. FIG. 5 is a block diagram of the control, and reference numeral 10 is a control device of the automatic pouring device 1. The control device 10 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 device 10 may be realized by an electric circuit.

The controller 10 includes a set value storage means 15, a pouring instruction means 16, a data storage / collection position storage instruction means 17, and a pouring information storage means 18.

Numeral 14 is a control device for the casting system. The control device 14 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 device 14 may be realized by an electric circuit.

The control device 14 incorporates a test piece extraction means 19 and a test piece data collection means 20. Further, the control device 10 and the control device 14 are electrically connected to each other. The automatic pouring device 1 is electrically connected to the control device 10. The control device 14 is electrically connected to a position detector 21, a test piece take-out device 13, a molding line data sending device 22, and a molten metal transport device data sending device 23.

The test piece take-out means 19 includes a mold shifter 24, a test piece pouring information storage means 25, a test piece detection instruction means 26, and a test piece take-out instruction means 27. The test piece data collecting means 20 includes a molding information collecting means 28, a pouring information collecting means 29, a melting information collecting means 30, and a test piece data storage means 31.

The set value storage means 15 stores a test piece pouring start weight set value and a test piece pouring weight. The pouring information storage means 18 stores pouring information related to the automatic pouring device 1. Examples of the pouring information related to the automatic pouring device 1 include the pouring weight, the number of pouring, and the pouring temperature.

The operation of the control of such a configuration will be described. As described above, the mold group of the mold M is intermittently conveyed in the direction of the arrow Y1 by one pitch (one mold). The feed position of the mold M is detected by the position detector 21. Then, the mold shifter 24 is shifted in accordance with the movement of the mold M. Note that the address of the mold M is assigned in advance to each of the molds M that continuously exist between the mold making machine 11 with the horizontal split frame and the mold spreading device 12. As described above, the mold shifter 24 is shifted in accordance with the movement of the mold M, so that it is possible to grasp which mold M is in which position.

When the pouring of the mold M into the product cavity Mc by the ladle 9 is repeated, the weight of the molten metal in the ladle 9 gradually decreases. At this time, the weight of the molten metal in the ladle 9 is measured with a load cell (not shown). When several times of pouring are finished and the weight of the molten metal in the ladle 9 becomes equal to or less than the test piece pouring start weight set value stored in the set value storage means 15, the pouring instruction means 16 Thus, the automatic pouring apparatus 1 is instructed to pour water into the test piece cavity Ma.

In addition, the pouring to the test piece cavity Ma pours the test piece pouring weight stored in the set value storage means 15. Further, when pouring the test piece cavity Ma, the test piece pouring information relating to the pouring of the test piece is collected at a predetermined timing and stored in the test piece pouring information storage means 25. The test piece pouring information related to the pouring of the test piece is, for example, information for identifying the test piece, and specifically includes the test piece number, the test piece pouring time, the ladle number, and the like. It is done.

Further, when pouring the test piece cavity Ma, molding information relating to the molding of the mold M, pouring information relating to the automatic pouring device 1 and melting information relating to the molten metal are collected at a predetermined timing. . This collection is executed by the data storage / collection position storage instruction means 17 instructed to the test piece data collection means 20. The molding information collecting means 28 collects molding information relating to molding of the mold M sent from the molding line data sending device 22. As the molding information related to the molding of the mold M, for example, molding time, planned pouring material, product number and the like can be mentioned.

The pouring information collecting means 29 reads and collects pouring information related to the automatic pouring apparatus 1 from the pouring information storage means 18. Further, the melting information collecting means 30 collects melting information related to the molten metal sent from the molten metal conveying device data sending device 23. Examples of the melting information related to the molten metal include a hot water time, a hot water temperature, and an alloy addition amount. The collected information, that is, the test piece pouring information, the molding information, the pouring information, and the melting information are stored in association with each other, and are centrally managed as collected test piece data. The

Then, before taking out and collecting the test piece from the mold M, the presence / absence of the test piece of the transferred mold M is detected. The presence / absence of the test piece of the mold M is detected by the test piece detection instruction means 26. Then, when the test piece detection instructing means 26 arrives at a position before the mold M having the test piece is carried into the mold separating device 12 (before one mold), this is indicated to the test piece removal instructing means 27. Command. The test piece take-out instruction means 27 sends a command to the test piece take-out device 13 to operate the test piece take-out device 13. Then, the test piece is taken out from the mold M by the test piece take-out device 13 and collected. And before taking out the test piece from the next mold M, the test piece number is written on the collected test piece so that it can be collated with the results of various tests using the test piece.

In the test piece sampling method according to the embodiment described above, since the molten metal is poured into the test piece cavity Ma by the ladle 9 in the automatic pouring apparatus 1, there is an effect that there is no dangerous work by a person. In addition, since the pouring of the test piece cavity Ma by the ladle 9 is not a work by a person, it is never forgotten to pour the hot water into the test piece cavity Ma. For this reason, there exists an effect that a molten metal can be reliably extract | collected as a test piece per pouring ladle unit. Furthermore, in the present invention, since the molten metal is poured into the test piece cavity Ma formed on the upper surface of the mold M in a ladle unit, the test pieces are not made in all the molds. For this reason, the number of test pieces to be produced can be greatly reduced, and the yield can be improved.

In the above-described embodiment, the process of pouring molten metal into the test piece cavity Ma formed on the upper surface of the mold M in a ladle unit is performed after a predetermined number of times of pouring the mold M by the automatic pouring device 1. When the weight of the remaining molten metal in the ladle 9 becomes equal to or less than a predetermined set weight value, the operation is performed. According to this embodiment, there is an effect that it is possible to reliably obtain a test piece in a ladle unit and to easily manage the molten metal in the ladle unit. Moreover, there is also an effect that it is possible to prevent the remaining molten metal in the ladle 9 from being insufficient when pouring the test piece cavity Ma. However, pouring to the test piece cavity Ma is not limited to when the weight of the molten metal in the ladle 9 is equal to or less than the set weight value. For example, pouring into the mold M by the automatic pouring device 1 in a ladle unit. After performing hot water a predetermined number of times, the molten metal may be poured into the test piece cavity Ma of the next mold M. In addition, in one embodiment, the automatic pouring apparatus 1 is not limited to the tilting method such as the tilting shaft unit 6 described above, and uses a method different from the tilting method, such as a stopper method, to pour the mold M. Also good. Further, the shape of the ladle may be a bucket shape, a fan shape, or the like. Furthermore, in one embodiment, the traveling carriage 3 that can move in the direction of the mold may not be provided.

Furthermore, in the above-described embodiment, when pouring the molten metal in a ladle unit into the test piece cavity Ma formed on the upper surface of the mold M, the test piece pouring information relating to the pouring of the test piece at a predetermined timing, Molding information related to molding of the mold M, pouring information related to the automatic pouring device 1, and melting information related to the molten metal are collected, and the test piece pouring information, molding information, pouring information and melting information are collected. The collected test piece data is unified. By adopting the test piece data management method of this embodiment, there is an advantage that traceability is improved. In addition, the test piece model SM according to one embodiment can form a test piece cavity Ma for casting the test piece S used in the method for collecting a test piece of molten metal poured into the mold M described above. This test piece model SM is fixed to a squeeze member SB in a mold making machine. For this reason, when the upper mold M1 is molded by the mold molding machine, the test piece cavity Ma can be formed on the upper surface of the upper mold M1. Therefore, there is an advantage that the test piece cavity Ma can be formed efficiently. The specimen model SM is characterized in that the shape thereof is a quadrangular prism or a cylinder. With such a shape, it can be used immediately for material testing and the like.

In the embodiment of the present invention, the presence / absence of the test piece of the transported mold M is detected by the test strip detection instruction means 26, but the present invention is not limited to this, and the test of the transported mold M is not limited thereto. You may make it detect the presence or absence of a piece with a sensor (for example, camera).

Further, in the embodiment of the present invention, the test piece is taken out from the mold M by the test piece take-out device 13 and collected. However, the present invention is not limited to this. The test piece may be taken out from and collected.

DESCRIPTION OF SYMBOLS 1 ... Automatic pouring apparatus, 9 ... Ladle, 12 ... Mold spreader, M ... Mold, Ma ... Test piece cavity, S ... Test piece, Squeeze member ... SB, Test piece model ... SM.

Claims

A test piece collecting method for collecting the molten metal in the ladle as a test piece in an automatic pouring apparatus for pouring the molten metal in the ladle into a mold,
Pouring molten metal into the test piece cavity formed on the upper surface of the mold in units of the ladle;
After the molten metal poured into the test piece cavity is cooled and becomes the test piece, the step of taking out and collecting the test piece from the mold conveyed with the test piece;
A test piece collecting method.
In the step of taking out and collecting the test piece, the molten metal poured into the test piece cavity is cooled to become the test piece, and the mold conveyed together with the test piece is a mold separating device. The test piece collection method according to claim 1, wherein the test piece is taken out and collected from the mold before being carried into the mold.
The step of pouring the molten metal in the ladle unit into the test piece cavity formed on the upper surface of the mold is performed when the weight of the remaining molten metal in the ladle is equal to or lower than a predetermined set weight value. The test piece collection method according to claim 1 or 2.
The test piece collection method according to claim 1 or 2, further comprising a step of detecting the presence or absence of the test piece of the mold to be conveyed before the step of taking out and collecting the test piece from the mold.
A data management method for a specimen collected by the specimen collecting method according to claim 1 or 2,
When pouring molten metal in the ladle unit into the test piece cavity formed on the upper surface of the mold, the test piece pouring information relating to the pouring of the test piece and the molding of the mold are performed at a predetermined timing. The molding information, the pouring information related to the automatic pouring device, and the melting information related to the molten metal are collected, and the test piece pouring information, the molding information, the pouring information and the melting information are stored in association with each other. , Test piece data management method.
A test piece model for forming a test piece cavity for casting a test piece used in the test piece collecting method according to claim 1 or 2.
The test specimen model according to claim 6, which is fixed to a squeeze member in a mold making machine.
The test piece model according to claim 6, which has a quadrangular prism or cylindrical shape.