WO2022018870A1

WO2022018870A1 - Cored wire production apparatus and cored wire production method using same

Info

Publication number: WO2022018870A1
Application number: PCT/JP2020/028543
Authority: WO
Inventors: 洋一東
Original assignee: 大阪特殊合金株式会社
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2022-01-27
Also published as: JP6813927B1; JPWO2022018870A1

Abstract

Provided are: a cored wire production apparatus that can uniformly make filling amounts or blending ratios of additives and ensure quality; and a cored wire production method using the cored wire production apparatus.　An additive A is a powder body in which a first raw material m1 and a second raw material m2 having a specific gravity less than the first raw material m1 are mixed. A hopper 3 has a weight measurement part 33 which measures the total weight of the hopper. An additive generation device 4 has a cylindrical agitation part, a first input port and a first discharge port, and the first input port and the first discharge port are disposed vertically. A conveyance device 5 coveys the additive A in each predetermined amount to a guidance device. The guidance device 6 has a second input port and a second discharge port, which are disposed vertically. A control device 7 monitors the amount of the additive A filled into a coating material C and/or the mixing ratio of one raw material in the additive A, on the basis of the measured value of the weight measurement part 33.

Description

Coard wire manufacturing equipment and method of manufacturing cored wire using this

The present invention relates to a cored wire manufacturing apparatus and a cored wire manufacturing method using the cored wire manufacturing apparatus. More specifically, a cored wire provided with a molding apparatus having a molding portion for molding a coating material filled with a powdery additive such as an alloy or metal powder to be charged into a molten metal into a long wire shape at a predetermined molding speed. The present invention relates to a manufacturing apparatus of the above and a method of manufacturing a cored wire using the same.

Conventionally, a cored wire is produced by covering a powdery additive such as an alloy or metal powder to be charged into a molten metal with a coating material and forming it into a long wire, and using a wire feeder as described in Patent Document 1, for example. A wire injection method is known in which a cored wire of a lever is put into a molten metal. By this method, work efficiency and quality of molten metal are improved.

However, during the production of cored wire, excess or deficiency (variation) in the filling amount and mixing ratio of additives may occur in a part of the cored wire due to segregation of raw materials in the process, and further quality improvement is desired. It was rare. In addition, there is no method for guaranteeing that the filling amount and blending ratio of the additive are uniform over the entire length of the cored wire.

Special Table 2010-506042

In view of such conventional circumstances, the present invention can produce a cored wire capable of suppressing segregation of granular raw materials, making the filling amount and blending ratio of additives uniform over the entire length of the cored wire, and guaranteeing the quality. It is an object of the present invention to provide an apparatus and a method for manufacturing a cored wire using the apparatus.

In order to achieve the above object, the feature of the cored wire manufacturing apparatus according to the present invention is that the covering material filled with powdery additives such as alloys and metal powders to be charged into the molten metal is long at a predetermined molding speed. In a configuration provided with a molding apparatus having a molding portion for molding into a wire shape, the additive is a powdery body obtained by mixing a powdery first raw material and a granular second raw material having a specific gravity smaller than that of the first raw material. An additive that produces the additive by stirring and mixing the hopper group having a hopper containing the first raw material and the second raw material, and the first raw material and the second raw material discharged from the hopper group. The hopper further comprises a generation device, a transfer device for transporting the generated additive, a guidance device for guiding the transported additive to the molding portion, and a control device for controlling each device. The additive generation device has an accommodating unit for accommodating raw materials, a discharging unit for discharging a fixed amount of raw materials contained from the accommodating unit, and a weight measuring unit for measuring the weight of the entire hopper at predetermined time intervals. Is located at the cylindrical stirring section, the first input port located above the stirring section and into which the first raw material and the second raw material discharged from the discharging section are charged, and the lower part of the stirring section. It has a first discharge port for discharging the generated additive, the first input port and the first discharge port are arranged along the vertical direction, and the stirring portion is on the inner surface thereof. A plurality of inclined surface portions inclined toward the first discharge port are provided, and the first raw material and the second raw material charged from the first input port are inclined toward the first discharge port. The additive is generated by dropping the additive while colliding with the surface portion, and the transport device transports the additive discharged from the first discharge port to the guide device in predetermined amounts. The induction device has a plurality of, the tubular main body portion, the second input port located in the upper part of the main body portion and into which the additive is charged from the bucket, and the additive located in the lower part of the main body portion. It has a second discharge port for discharging the agent to the molding unit, the second input port and the second discharge port are arranged along the vertical direction, and the control device is a weight measuring unit. The purpose is to monitor the filling amount of the additive in the coating material and / or the mixing ratio of one of the raw materials in the additive based on the measured value.

In the above configuration, the additive is a powdery body obtained by mixing a powdery first raw material and a granular second raw material having a specific gravity smaller than that of the first raw material. In such a case, if all of these are housed in a single hopper, segregation occurs due to the difference in specific gravity, and the filling ratio of the raw materials becomes non-uniform during cored wire molding, resulting in variation.
According to the above configuration, since the first raw material and the second raw material are housed in the hoppers of the hopper group, respectively, segregation caused by the difference in specific gravity can be suppressed. Further, since the hopper has a discharge unit that discharges the raw material contained in the storage unit in a fixed amount, it is possible to suppress the variation in the ratio of the raw material in the additive due to the discharge from the hopper.
Next, the additive generator has a tubular stirring unit, a first input port located above the stirring unit and into which the first and second raw materials discharged from the discharging unit are charged, and a lower portion of the stirring unit. It has a first discharge port for discharging the generated additive, the first input port and the first discharge port are arranged along the vertical direction, and the stirring part is first on the inner surface thereof. A plurality of inclined surface portions inclined toward the discharge port are provided, and the first raw material and the second raw material charged from the first input port are dropped to the first discharge port while colliding with the plurality of inclined surface portions. To produce an additive. Therefore, each raw material contained in each hopper can be stirred and mixed without being deposited from the first input port to the first discharge port, and segregation of the material is suppressed.
Further, the transport device has a plurality of buckets separated from each other for transporting the additive discharged from the first discharge port to the guidance device for each predetermined amount. In this way, since the additive is transported in small portions in bucket units, segregation of the raw material during transport can be suppressed to a minimum.
Then, the guidance device has a cylindrical main body portion, a second input port located at the upper part of the main body portion where the additive is charged from the bucket, and a second input port located at the lower part of the main body portion to discharge the additive to the molding portion. It has two discharge ports, and the second input port and the second discharge port are arranged along the vertical direction. As a result, the conveyed additive is guided to the molded portion by the main body portion. That is, since segregation of the first raw material and the second raw material is always suppressed in a series of supply processes from the hopper group to the molding part, the filling amount and the raw material ratio of the additive supplied to the molding part can be kept constant without variation. The filling amount and blending ratio of the additive can be made uniform over the entire length of the cored wire formed in a long shape.
Moreover, the hopper has a discharge unit that discharges the raw material contained in the storage unit in a fixed amount, and a weight measurement unit that measures the weight of the entire hopper at predetermined time intervals. Thereby, by measuring the weight loss of the hopper, the discharge amount (cutting amount) of the first raw material and the second raw material can be accurately measured at predetermined time intervals. Then, the control device monitors the filling amount of the additive in the coating material and / or the mixing ratio of one raw material in the additive based on the measured value of the weight measuring unit, so that the cored wire formed in a long shape is formed. It is possible to guarantee the quality of the filling amount and the compounding ratio of the additive over the entire length of.

The discharge port of the first hopper accommodating the first raw material and the discharge port of the second hopper accommodating the second raw material are arranged so as to face each other with the first input port interposed therebetween, and the stirring portion has a corner. It is preferable that the plurality of inclined surface portions are tubular and are provided alternately on the inner surface of the side surface of the stirring portion where each discharge port is located. As a result, the first raw material and the second raw material are efficiently stirred and mixed in the stirring unit, and segregation can be suppressed.

In such a case, it is preferable that the plurality of inclined surface portions are provided on the inner surface of the stirring portion at an angle at which the inclination angle with respect to the horizontal plane is larger than the angle of repose of the first raw material and the second raw material. As a result, the raw materials fall toward the first discharge port without accumulating on the plurality of inclined surfaces, so that segregation of the raw materials can be prevented and agitated.

Further, the discharge portion includes an outer cylinder portion that is larger than the outer diameter of the accommodating portion and forms a receiving portion that communicates with the lower portion of the accommodating portion through a gap, and the material accommodated from the receiving portion. A discharge port for discharging to one input port and a rotary vane portion rotatably provided on the bottom surface of the outer cylinder portion to send the material contained through the gap to the outer peripheral portion of the receiving portion and guide the material to the discharge port. It is desirable that the feeder has and. With a so-called table feeder having such a configuration, bridges and rat holes can be suppressed, and raw materials can be continuously discharged (cut out) in a more quantitative manner without variation.

Further, it is preferable that the inner surface of the main body portion is inclined toward the center side at an angle larger than the angle of repose of the additive with respect to the horizontal plane. As a result, the additive falls toward the second discharge port without accumulating on the inner surface of the main body portion, so that segregation of the raw material can be prevented and the additive can be guided to the molded portion.

The second discharge port has a tapered shape, the lower end portion thereof is close to the opening of the covering material in the molding portion, and the additive is used in a state where a predetermined amount of the additive is deposited on the main body portion. It is advisable to fill the covering material. Since the additive is filled in the dressing with a predetermined amount of the additive deposited in the main body, the weight of the deposited additive is loaded on the additive filled inside the dressing to make the packing density uniform. At the same time, cavities are less likely to occur inside the covering material. Further, by depositing a predetermined amount of the additive on the main body, it is possible to suppress the variation in the filling amount to the covering material even if the supply of the additive from the upstream is delayed.

The control device further has a molding condition recording unit that records the molding speed and the molding length of the cored wire molded by the molding portion, and the molding condition recording unit molds from the molding speed and the molding length. The time is calculated, and based on the calculated molding time and the predetermined time, the filling amount of the additive and / or the mixing ratio of one raw material to the additive at a predetermined position of the molded cored wire is estimated. You may. As a result, the filling amount and / or the mixing ratio of the additive at an arbitrary position (length) of the cored wire can be grasped, and the quality assurance can be guaranteed over the entire length of the cored wire.

In any of the above configurations, for example, the first raw material is a granular mixture of Fe—Si and other alloys, and the second raw material is a powder of Mg.

In order to achieve the above object, the feature of the cored wire manufacturing method according to the present invention is the above-mentioned first raw material and the second raw material in the cored wire manufacturing method using the cored wire manufacturing apparatus according to any one of the above. Is housed in each hopper of the hopper group, the first raw material and the second raw material are discharged from each hopper in a fixed amount to the first inlet, and the weight of the entire hopper is measured at predetermined time intervals. The additive is produced by dropping the first raw material and the second raw material charged into the first charging port to the first discharging port while colliding the inside of the stirring portion with the plurality of inclined surface portions. The additive discharged from one discharge port is conveyed to the second input port by a predetermined amount in the bucket, and the additive conveyed to the second input port is guided to the molding unit by the main body portion. At the same time, the purpose is to monitor the filling amount of the additive in the covering material and / or the mixing ratio of one raw material in the additive based on the weight of the entire hopper measured at predetermined time intervals.

According to the characteristics of the cored wire manufacturing apparatus and the cored wire manufacturing method according to the present invention, segregation of granular raw materials can be suppressed, and the filling amount and blending ratio of additives can be made uniform over the entire length of the cored wire, and the quality can be made uniform. Can be guaranteed.

Other objects, configurations and effects of the present invention will be clarified from the following embodiments of the present invention.

It is the schematic which shows schematically the manufacturing apparatus of the cored wire which concerns on this invention. It is a figure which shows the discharge part of the lower part of a hopper schematically. It is a figure which shows typically the internal structure of the stirring part of an additive generation apparatus. It is a schematic diagram which omitted a part of a transfer device. (A) is a schematic view showing the guidance device, and (b) is a partially enlarged schematic view of the supply direction view of the covering material in the vicinity of the second discharge port. It is a block diagram of a control device. It is a graph which shows an example of the change with the passage of time of the filling rate of the 2nd raw material. It is a graph which shows an example of the change of the filling rate of the 2nd raw material in the molding length of a cored wire. It is a schematic diagram explaining the occurrence of segregation in the conventional method of forming a cored wire.

Next, the present invention will be described in more detail with reference to FIGS. 1 to 7.
As shown in FIG. 1, the cored wire manufacturing apparatus 1 according to the present invention generally comprises a coating material C filled with a powdery additive A such as an alloy or metal powder to be charged into a molten metal at a predetermined molding speed. A molding device 2 having a molding unit 21 for molding into a long wire shape is provided, and a hopper group 3, an additive generation device 4, a transfer device 5, a guidance device 6, and a control device 7 for controlling these are further provided.

In the present embodiment, the covering material C is a metal thin plate (hoop) made of a material that does not affect the molten metal, such as Fe (iron), and is predetermined from the coil Cc to the molding portion 21 by a feeding device (not shown). Supplied at speed. In the molding unit 21, the inside of the coating material C deformed into a substantially U-shaped cross section is filled with the additive A discharged from the induction device 6 described later, and the opening portion is closed to form a tube shape to form a predetermined molding. It is formed into a long wire-shaped cored wire W at a high speed. The molded cored wire W is wound around a drum to become a wire coil Wc having a predetermined length (distance).

This cored wire W is used, for example, in steelmaking and cast iron, and as a so-called wire injection method, a cored wire W having a predetermined length is poured into a molten metal from a wire coil Wc by a wire feeder. The additive A is a powdery body obtained by mixing a powdery first raw material m1 and a granular second raw material m2 having a specific gravity smaller than that of the first raw material m1. In the present embodiment, the cored wire W is used, for example, for graphite spheroidizing treatment of ductile cast iron, and the first raw material m1 of the additive A is a powdery mixture of Fe—Si and other alloys. The two raw materials m2 are made of Mg powder.

As shown in FIG. 1, the hopper group 3 has a first hopper 30a and a second hopper 30b for accommodating the above-mentioned first raw material m1 and second raw material m2, respectively, in the present embodiment. The first hopper 30a includes a first accommodating portion 31a for accommodating the first raw material m1, a first discharging portion 32a for discharging a fixed amount of the first raw material m1 accommodated from the first accommodating portion 31a, and a first hopper 30a. It has a first weight measuring unit 33a that measures the entire weight at predetermined time intervals. The second hopper 30b has the same configuration as the first hopper 30a, and has a second accommodating unit 31b, a second discharging unit 32b, and a second weight measuring unit 33b.

In the present embodiment, the first raw material m1 and the second raw material m2 having different specific densities are separated and housed in the

hoppers

30a and 30b, but the first raw material m1 and the second raw material m2 are stirred and mixed to add an additive. It is also conceivable to house A in one hopper after making it. However, in such a case, segregation occurs in the hopper due to the difference in specific gravity, and even if the additive A contained in a certain amount can be discharged, the discharged additive is a mixture of the first raw material m1 and the second raw material m2. There will be variations in the ratio. Therefore, by separately accommodating the first raw material m1 and the second raw material m2 having different specific densities, segregation due to the difference in specific densities is suppressed, and the blending ratio of the produced additive A is stabilized. The first and

second hoppers

30a and 30b are arranged so as to face each other with the additive generation device 4 described later interposed therebetween.

A plurality of support pieces 31z are provided on the outer surface of the first accommodating portion 31a. By the support by the support piece 31z, the first weight measuring unit 33a measures the weight of the entire first hopper 30a. The second accommodating portion 31b has the same configuration.

As shown in FIG. 2, the first discharging portion 32a is an outer cylinder portion that is larger than the outer diameter of the first accommodating portion 31a and forms a receiving portion 36a that communicates with the lower portion of the first accommodating portion 31a through the gap 35. 36, a discharge port 37 for discharging the material contained from the receiving portion 36a to the first input port of the additive generation device 4 described later, and a rotatably provided bottom surface 36b of the outer cylinder portion 36 via a gap 35. It has a rotary vane 38 that sends the contained material to the outer peripheral portion 36c of the receiving portion 36a and guides it to the discharge port 37. The rotary vane 38 is controlled via a motor 39. The second discharge unit 32b has the same configuration.

In the first accommodating portion 31a, the first raw material m1 moves from the gap 35 provided on the entire circumference of the lower part of the first accommodating portion 31a to the receiving portion 36a by its own weight, and the outer peripheral portion of the receiving portion 36a is moved by the rotary vane portion 38. It is cut out (extruded) to 36c and guided to the discharge port 37. By controlling the rotation of the rotary vane 38 in this way, a constant amount of the first raw material m1 can be discharged at predetermined time intervals, and segregation can be prevented. The second discharge unit 32b has the same configuration, and these

discharge units

32a and 32b are examples of a device called a so-called mass flow type feeder.

Then, as described above, the

weight measuring units

33a and 33b measure the weight of the

entire hoppers

30a and 30b. Therefore, when the measured amount is subtracted at predetermined time (measurement interval), the accommodating units 31a, The weight change (weight loss) of each of the raw materials m1 and m2 contained in 31b can be obtained. Therefore, it is possible to calculate the emission amount (cutting amount) of the first raw material m1 and the second raw material m2 and the mixing ratio of the raw materials at predetermined time intervals. The predetermined time can be appropriately set according to the required quality of the cored wire W, the data capacity of the measurement data, and the like.

The additive generation device 4 generates the additive A by stirring and mixing the raw materials m1 and m2 discharged from the

hoppers

30a and 30b. In the present embodiment, the additive generation device 4 has a cylindrical stirring unit 41, and a first raw material m1 and a second raw material m2 located above the stirring unit 41 and discharged from the discharging unit 32 are charged. It has one input port 42 and a first discharge port 43 located below the stirring unit 41 and discharging the generated additive A. The first input port 42 and the first discharge port 43 are arranged along the vertical direction Z.

As shown in FIG. 3, the stirring portion 41 is provided with a plurality of inclined surface portions 44 inclined toward the first discharge port 43 on the inner surface thereof. In the present embodiment, the stirring portion 41 has a square tubular shape, and the plurality of inclined surface portions 44 are composed of first to third inclined surfaces 44a to 44c provided at three positions alternately in the vertical direction Z. The first inclined surface 44a is provided on the first inner side surface 41a on the side where the first discharge portion 32a of the first hopper 30a accommodating the first raw material m1 is located. Further, the second and third

inclined surfaces

44b and 44c are provided on the second inner side surface 41b on the side where the second discharge portion 32b of the second hopper 30b accommodating the second raw material m2 is located. The inclined surfaces 44a to 44c are provided so that the inclination angle θ1 with respect to the horizontal plane H is larger than the angle of repose of the first raw material m1 and the second raw material m2. As a result, the raw materials m1 and m2 charged from the first charging port 42 collide with the first to third inclined surfaces 44a to 44c while falling to the first discharging port 43, and each time the flow direction changes. Mix and stir. Moreover, the first raw material m1 and the second raw material m2 slide down without being deposited on the inclined surfaces 44a to 44c. Therefore, the additive A having a constant mixing ratio of the first raw material m1 and the second raw material m2 can be continuously generated and discharged.

Since the first raw material m1 and the second raw material m2 are dropped by their own weight and stirred and mixed, "the first input port 42 and the first discharge port 43 are arranged along the vertical direction Z". This means that it is sufficient to follow the vertical direction.

The transport device 5 transports the generated additive A, and in the present embodiment, as shown in FIG. 4, the additive A discharged from the first discharge port 43 of the additive generation device 4 is used. It is a so-called bucket conveyor having a plurality of buckets 51 separated from each other to be conveyed to the guidance device 6 described later for each fixed amount. In the transport device 5, the receiving unit 52 that receives the additive A discharged from the first discharge port 43 is located lower than the first discharge chute 53 connected to the second input port 61 of the guidance device 6. A plurality of buckets 51 are moved up and down in the vertical direction Z by a drive unit (not shown). The movement path from the receiving portion 52 to the discharging chute 53 is covered with the housing 54. In FIG. 4, for convenience of explanation, a part of the housing 54 is omitted.

Here, the blending ratio of each raw material m1 and m2 does not change in the bucket 51 during transportation. Further, the capacity of the bucket 51 (transportation amount per bucket) is sufficiently small with respect to the filling amount of the cored wire W to be molded, and even if segregation occurs, its influence is small. Therefore, by transporting the cored wires W in independent buckets 51, it is possible to suppress variations in the raw materials in the entire length of the cored wire W (wire coil Wc).

The guidance device 6 is a substantially cylindrical chute that guides the additive A conveyed by the bucket 51 to the molding unit 21. In the present embodiment, as shown in FIG. 5, the guidance device 6 includes a cylindrical main body portion 61, a second input port 62 located above the main body portion 61 and into which the additive A is charged from the bucket 51. It is located at the lower part of the main body portion 61 and has a second discharge port 63 for discharging the additive A to the molding portion 21. The above-mentioned first discharge chute 53 is connected to the second input port 62, and the second discharge port 63 has, for example, a tapered shape and is narrowed downward (on the side of the covering material C). 64 is provided. The filling port 64 has, for example, a funnel shape, and its lower end 65 is close to the opening Co of the covering material C. Further, the second input port 62 and the second discharge port 63 are arranged along the vertical direction Z.

Here, the inner surface 61a of the main body 61 is inclined toward the center O side at an inclination angle θ2 larger than the angle of repose of the additive A with respect to the horizontal plane H, and is a second discharge port from the upper part on the second input port 62 side. The lower part on the side of 63 has a smaller diameter. Further, the additive A is deposited at a predetermined height from the filling port 64 to the vicinity of the second input port 62 of the main body 61. As a result, when the additive A is filled, the weight of the deposited additive A is loaded inside the covering material C, so that the filling density of the additive A inside the covering material C is made uniform. In addition, the generation of cavities due to insufficient filling in the generated cored wire W is suppressed. Further, by depositing a predetermined amount (or a predetermined height) of the additive A, the additive A corresponding to the filling amount to the covering material C (the amount discharged to the molding portion 21) is supplied from the second input port 62. Let it throw in.

At the time of filling, since the weight of the deposited additive A is loaded on the filling additive A, "the second input port 62 and the second discharge port 63 are arranged along the vertical direction Z. That means that it is enough to follow the vertical direction.

The control device 7 processes various signals received from the molding device 2, the hopper group 3, the additive generation device 4, the transfer device 5, and the guidance device 6, and controls the drive of each device. In the present embodiment, the control device 7 fills the molding unit 21 with the filling amount of the additive A and / or mixes one of the raw materials in the additive A based on the measured values of the first and second

weight measuring units

33a and 33b. Monitor the ratio. As the mixing ratio, for example, the ratio of the second raw material m2 (filling rate of Mg) in the additive A is calculated.

As shown in FIG. 6, the control device 7 generally includes a data receiving unit 71 that receives data (signals) such as measurement data of each device, and a data transmitting unit 72 that transmits control data and the like of each device. It has a processing unit 73 that processes received data, an input / output unit 74 that receives input signals such as control conditions and outputs processed data, and a storage unit 75 that stores various data. The control device 7 is configured by, for example, a personal computer, and data can be transmitted and received to and from each device regardless of whether it is wired or wireless.

Here, as shown in Table 1, the processing unit 73 discharges the first raw material m1 and the second raw material m2 from the

accommodating units

31a and 31b for each measurement time of the

weight measuring units

33a and 33b (actually). The flow rate value) and the filling rate of the second raw material m2 in the additive A are calculated. In this way, based on the measured value of the weight measuring unit 33, the filling amount of the additive A in the coating material C in the molding unit 21 and / or the mixing ratio of one of the raw materials (for example, the second raw material m2) is monitored. .. Further, the filling amount of the additive A per unit length can be calculated from the integrated value of the discharge amount measured by the

weight measuring units

33a and 33b and the total length (molding length) of the wire coil Wc, and the actually manufactured wire can be calculated. By measuring and comparing the actual weight of the coil Wc, it is possible to confirm the filling amount. This monitoring (data measurement) is performed from the production start time of the cored wire Wc (for example, the discharge start time from the

hoppers

30a and 30b) to the production completion time (for example, the filling completion time of the desired cored wire length). Table 1 is an example of excerpting a part of the data.

As described above, each of the

discharge units

32a and 32b is a mass flow type feeder, and is discharged in a fixed amount in a state where segregation is prevented. Further, segregation is prevented and the transport amount per unit time does not change even in the transport path from the hopper group 3 to the molding device 2 via the additive generation device 4, the transport device 5, and the guidance device 6. Therefore, by continuously measuring the weight loss of the hopper 30 by the weight measuring unit 33, the filling amount of the additive A inside the wire and one of them over the entire length of the cored wire W (wire coil Wc) to be manufactured. It is possible to guarantee the mixing ratio of the raw materials.

Further, in the present embodiment, the processing unit 73 has a molding condition recording unit 73a that records the molding speed of the molding apparatus 2 and the molding length of the cored wire W molded by the molding unit 21. As described above, each of the

weight measuring units

33a and 33b measures the discharge amount and the blending ratio of the first raw material m1 and the second raw material m2 discharged from the

respective discharge units

32a and 32b at predetermined time (measurement interval). ing. The raw materials m1 and m2 discharged at the measurement time T0 reach the molding unit 21 after the passage time T'of the transport path. That is, it can be considered that the measured value at a certain measurement time T is filled in the covering material C at the time T0 + T', which is the sum of the measurement time T0 and the transit time T'. Then, since the molding condition recording unit 73a calculates the molding time from the molding speed and the molding length of the cored wire W, the cored wire W is added at a predetermined position based on the calculated molding time and the predetermined time (measurement interval). The filling amount of the agent A and / or the mixing ratio of one of the raw materials can be estimated. In the wire injection method, not all of the manufactured wire coil Wc is put into the molten metal. If the filling amount of the additive A at a predetermined position of the wire coil Wc and the mixing ratio of one of the raw materials can be estimated, it can contribute to ensuring the quality of the molten metal treatment.

Next, the manufacturing process of the coil Wc of the cored wire W will be described.
First, the first raw material m1 and the second raw material m2 are sized by a mixing device such as a blender (not shown) and housed in the

hoppers

30a and 30b of the hopper group 3. Next, the first raw material m1 and the second raw material m2 are discharged from the

accommodating portions

31a and 31b from the discharging

portions

32a and 32b to the first input port 42 in a fixed amount, and the weight of the

entire hoppers

30a and 30b is determined. Each time is measured by each

weight measuring unit

33a, 33b. The measured data is transmitted to the data receiving unit 71.

Additive A is generated by dropping the first raw material m1 and the second raw material m2 charged into the first charging port 42 to the first discharging port 43 while colliding the inside of the stirring portion 41 with the plurality of inclined surface portions 44a to 44c. do. The generated additive A is discharged from the first discharge port 43, the discharged additive A is transported to the second input port 62 in predetermined amounts by the bucket 51, and the transported additive A is the first discharge chute. It is fed into the second slot 62 from 53. The additive A deposited in the main body 61 is guided to the molding 21 by the filling port 64. Then, the molding unit 21 fills the covering material C supplied from the coil Cc at a predetermined molding speed and molded into a substantially U shape with the additive A to form a wire, and the molded cored wire W is a drum. Taken up by D. At the time of filling, the weight of the deposited additive A is loaded on the filling additive A, so that the additive A spreads inside the covering material C without gaps and the filling density becomes uniform over the entire length of the wire.

During the production of the cored wire W, for example, as shown in FIG. 7A, whether or not the filling amount (filling rate MV) of the second raw material m2 falls within the threshold value (between the upper limit High and the lower limit Low) including the set target value SV. By monitoring this in real time, the quality of the molded cored wire W can be guaranteed and the quality can be guaranteed. Further, the molding condition recording unit 73a calculates the molding time from the total length (molding length) and winding speed (molding speed) of the wire coil Wc of the cored wire W wound around the drum D, and for example, FIG. 7B. As shown in the above, the filling amount (blending ratio MV) of the second raw material m2 at a predetermined position of the wire coil Wc is also monitored. The sign ΔT shown in FIG. 7A indicates a measurement interval (predetermined time). Further, FIGS. 7A and 7B are examples of excerpts of a part of the transition of the measurement data at the time of manufacturing the cored wire Wc.

Next, the possibility of other embodiments will be mentioned. The same members as those in the above embodiment are designated by the same reference numerals.
In the above embodiment, the hopper group 3 uses two

hoppers

30a and 30b according to the raw material to be filled in the cored wire W. However, the number of hoppers is not limited to this, and for example, three or more may be used depending on the raw materials to be blended.

In the above embodiment, the cored wire W is used, for example, for graphite spheroidizing treatment of ductile cast iron, and the first raw material m1 of the additive A is a powdery mixture of Fe—Si and other alloys, and the second raw material m2. Was made into a powder of Mg. However, the use of the cored wire W is not limited to this, and it is used as various additives for steelmaking and cast iron, and the raw material of the additive A is appropriately selected according to the purpose. For example, pure metal powders, alloy powders, penetration auxiliaries, slag forming auxiliaries, and fluxes having different specific gravities can be mentioned.

In the above embodiment, the discharge unit 32 is configured by a so-called mass flow type feeder, but the present invention is not limited to this as long as it has a structure and structure capable of continuously discharging a certain amount. A screw feeder or a vibration type feeder can also be applied, but the mass flow type feeder of the above embodiment is superior in that a fixed amount can be stably and continuously discharged without discharge segregation.

In the above embodiment, the stirring portion 41 of the additive generation device 4 is formed in a square cylinder shape, and a plurality of inclined surface portions 44a to 44c are alternately provided on the

inner surfaces

41a and 41b thereof. However, the shape of the stirring portion 41, the position and number of the inclined surface portions 44, and the like are not limited to the above-described embodiment as long as the raw materials are efficiently stirred inside and segregation is prevented. Further, the guidance device 6 is not limited to the above embodiment as long as segregation of the additive A is prevented.

Although the embodiment of the present invention is configured as described above, more comprehensively, even if it is a cored wire manufacturing apparatus having the configurations listed below and a cored wire manufacturing method using the same. good.

Conventionally, when the powdery raw material m'is discharged from the hopper when the cored wire is manufactured, the flow speed is different between the raw material m'3 in the central portion S1 of the hopper and the raw material m'4 in the vicinity of the side surface S2, as shown in FIG. Since they are different, emission segregation may occur, resulting in excess or deficiency (variation) in the particle size distribution and emission amount, and further improvement in the quality of the cored wire has been desired. In addition, there is no method for guaranteeing that the filling amount of the additive is uniform over the entire length of the cored wire.

In view of the above-mentioned conventional circumstances, the invention having the following configuration can suppress segregation of granular raw materials, make the filling amount of the additive uniform over the entire length of the cored wire, and guarantee the quality of the cored wire. It is an object of the present invention to provide a manufacturing apparatus of the above and a method of manufacturing a cored wire using the same.

In order to achieve the above objectives, the cored wire manufacturing equipment is characterized by molding a covering material filled with powdery additives such as alloys and metal powders to be charged into the molten metal into a long wire shape at a predetermined molding speed. In a configuration provided with a molding apparatus having a molding portion to be formed, a hopper for accommodating the additive, a stirring device for stirring and mixing the additive discharged from the hopper, a transport device for transporting the additive, and a transport device for transporting the additive. Further, a guiding device for guiding the added additive to the molding portion and a control device for controlling each device are further provided, and the hopper includes an accommodating portion accommodating the additive and an addition accommodating from the accommodating portion. It has a discharge unit that discharges a fixed amount of the agent and a weight measurement unit that measures the weight of the entire hopper at predetermined time intervals. It has a first input port for charging the additive discharged from the discharge unit, and a first discharge port located below the stirring unit for discharging the additive. And the first discharge port are arranged along the vertical direction, and the stirring portion is provided with a plurality of inclined surface portions inclined toward the first discharge port on the inner surface thereof, and the first The additive was stirred by dropping the additive charged from the charging port to the first discharging port while colliding with the plurality of inclined surface portions, and the transport device was discharged from the first discharging port. It has a plurality of buckets separated from each other for transporting the additive to the induction device in a predetermined amount, and the induction device is located in a tubular main body portion and an upper part of the main body portion, and the additive is added from the bucket. The second input port and the second discharge port located in the lower part of the main body portion and discharging the additive to the molding portion are provided. Arranged along the vertical direction, the control device is to monitor the filling amount of the additive in the coating material based on the measured value of the weight measuring unit.

According to the above configuration, the stirring device is located at the cylindrical stirring section, the first input port located above the stirring section and into which the additive discharged from the discharging section is charged, and the lower portion of the stirring section. It has a first discharge port for discharging the agent, the first input port and the first discharge port are arranged along the vertical direction, and the stirring unit is inclined toward the first discharge port on the inner surface thereof. A plurality of inclined surface portions are provided, and the additive is agitated by dropping the additive charged from the first charging port to the first discharging port while colliding with the plurality of inclined surface portions. Therefore, the additive can be stirred and mixed without being deposited from the first input port to the first discharge port, and segregation of the material is suppressed.
Further, the transport device has a plurality of buckets separated from each other for transporting the additive discharged from the first discharge port to the guidance device for each predetermined amount. In this way, since the additive is transported in small portions in bucket units, segregation of the raw material during transport can be suppressed to a minimum.
Then, the guidance device has a cylindrical main body portion, a second input port located at the upper part of the main body portion where the additive is charged from the bucket, and a second input port located at the lower part of the main body portion to discharge the additive to the molding portion. It has two discharge ports, and the second input port and the second discharge port are arranged along the vertical direction. As a result, the conveyed additive is guided to the molded portion by the main body portion. That is, since segregation of the additive is always suppressed in a series of supply processes from the hopper to the molded portion, the filling amount and the raw material ratio of the additive supplied to the molded portion can be kept constant without variation and formed into a long shape. The filling amount and blending ratio of the additive can be made uniform over the entire length of the cored wire.
Moreover, the hopper has a discharge unit that discharges the raw material contained from the storage unit in a fixed amount without segregation, and a weight measurement unit that measures the weight of the entire hopper at predetermined time intervals. As a result, by measuring the weight loss of the hopper, the amount of the additive discharged (cut out amount) at predetermined time intervals can be accurately measured. Then, since the control device monitors the filling amount of the additive in the coating material based on the measured value of the weight measuring unit, the filling amount of the additive is guaranteed over the entire length of the cored wire formed in a long shape. Is possible.

In the above configuration, the control device further includes a molding condition recording unit that records the molding speed and the molding length of the cored wire molded by the molding unit, and the molding condition recording unit further records the molding speed and the molding. The molding time may be calculated from the length, and the filling amount of the additive at a predetermined position of the molded cored wire may be estimated based on the calculated molding time and the predetermined time. As a result, the filling amount of the additive at an arbitrary position (length) of the cored wire can be grasped, and the quality assurance can be guaranteed over the entire length of the cored wire.

In order to achieve the above object, the feature of the cored wire manufacturing method according to the present invention is that in the cored wire manufacturing method using the cored wire manufacturing apparatus described above, the additive is added in a fixed amount from the hopper. The weight of the entire hopper is measured at predetermined time intervals while being discharged to one charging port, and the additive charged into the first charging port is made to collide with the plurality of inclined surface portions in the stirring portion up to the first discharging port. The additive was stirred while being dropped, and the additive discharged from the first discharge port was conveyed to the second input port by the bucket in predetermined amounts and then to the second input port. The purpose is to guide the additive to the molding portion by the main body portion and to monitor the filling amount of the additive into the coating material based on the weight of the entire hopper measured at predetermined time intervals.

The molding device, the transfer device, the guidance device, and the control device in the cored wire manufacturing device are common to the molding device 2, the transfer device 5, the guidance device 6, and the control device 7 in the manufacturing device 1 described in the column of the above embodiment. do. The stirring device has the same configuration as the additive generating device 4 in the manufacturing device 1 described in the column of the above embodiment. Further, as the hopper, only one hopper 30 in the hopper group 3 in the manufacturing apparatus 1 described in the column of the above embodiment is used. Details of each device and method are as described in the column of the above-described embodiment.

The present invention can be used as a cored wire manufacturing apparatus containing an additive added to perform a desired treatment in various molten metal for steelmaking, cast iron, etc., and a cored wire manufacturing method using the same.

1: Manufacturing equipment 2: Molding equipment 3: Hopper group 4: Additive generation equipment (stirring equipment) 5: Conveying equipment (bucket conveyor), 6: Induction equipment (chute), 7: Control equipment, 21: Molding part, 30: Hopper, 30a: First hopper, 30b: Second hopper, 31: Housing part, 31a: First storage part, 31b: Second storage part, 31z: Support piece, 32: Discharge part (mass flow type) Feeder), 32a: First discharge unit, 32b: Second discharge unit, 33: Weight measurement unit, 33a: First weight measurement unit, 33b: Second weight measurement unit, 35: Gap, 36: Outer cylinder unit, 36a : Receiving part, 36b: Bottom surface, 36c: Outer peripheral part, 37: Discharge port, 38: Rotating wing part, 39: Motor, 41: Stirring part, 41a: First inner surface, 41b: Second inner surface, 42: No. One input port, 43: first discharge port, 44: inclined surface portion, 44a: first inclined surface, 44b: second inclined surface, 44c: third inclined surface, 51: bucket, 52: receiving portion, 53: first Discharge chute, 54: Housing, 61: Main body, 61a: Inner surface, 62: Second input port, 63: Second discharge port, 64: Fill port, 65: Lower end, 71: Data receiving unit, 72: Data transmission Unit, 73: Processing unit, 73a: Molding condition recording unit, 74: Input / output unit, 75: Storage unit, A: Additive, C: Coating material, Cc: Coating material coil, Co: Opening, M: Raw material, m1 : 1st raw material, m2: 2nd raw material, W: cored wire, Wc: wire coil, V: molding speed, L: molding length, T: molding time

Claims

A cored wire manufacturing device equipped with a molding device having a molding part for molding a covering material filled with powdery additives such as alloys and metal powders to be charged into a molten metal into a long wire shape at a predetermined molding speed. There,
The additive is a powdery body obtained by mixing a powdery first raw material and a granular second raw material having a specific gravity smaller than that of the first raw material.
An additive generator that stirs and mixes a hopper group having a hopper for accommodating the first raw material and the second raw material, and the first raw material and the second raw material discharged from the hopper group to generate the additive. Further, a transport device for transporting the generated additive, a guidance device for guiding the transported additive to the molding portion, and a control device for controlling each device are further provided.
The hopper has an accommodating unit for accommodating raw materials, a discharging unit for discharging a fixed amount of the raw material accommodated from the accommodating unit, and a weight measuring unit for measuring the weight of the entire hopper at predetermined time intervals.
The additive generation device includes a cylindrical stirring unit, a first input port located above the stirring unit and into which the first raw material and the second raw material discharged from the discharging unit are charged, and the stirring. It has a first discharge port for discharging the generated additive, which is located at the lower part of the portion, and the first input port and the first discharge port are arranged along the vertical direction.
The stirring portion is provided with a plurality of inclined surface portions inclined toward the first discharge port on the inner surface thereof, and the first raw material and the second raw material charged from the first charging port are the first. The additive is produced by dropping the additive to the discharge port while colliding with the plurality of inclined surface portions.
The transport device has a plurality of buckets separated from each other for transporting the additive discharged from the first discharge port to the guidance device in predetermined amounts.
The guidance device is located at a cylindrical main body, a second input port located at the upper part of the main body and into which the additive is charged from the bucket, and at the lower part of the main body to mold the additive. It has a second discharge port for discharging to the unit, and the second input port and the second discharge port are arranged along the vertical direction.
The control device is a cored wire manufacturing device that monitors the filling amount of the additive in the coating material and / or the mixing ratio of one raw material in the additive based on the measured value of the weight measuring unit.
The discharge port of the first hopper accommodating the first raw material and the discharge port of the second hopper accommodating the second raw material are arranged so as to face each other with the first input port interposed therebetween, and the stirring portion has a corner. The cored wire manufacturing apparatus according to claim 1, wherein the plurality of inclined surface portions have a tubular shape and are provided alternately on the inner surface of the side surface of the stirring portion where each discharge port is located.
The cored wire manufacturing apparatus according to claim 2, wherein the plurality of inclined surface portions are provided on the inner surface of the stirring portion at an angle of inclination with respect to a horizontal plane larger than the angle of repose of the first raw material and the second raw material.
The discharge portion includes an outer cylinder portion that is larger than the outer diameter of the accommodating portion and forms a receiving portion that communicates through a gap at the lower portion of the accommodating portion, and a material that is more accommodated from the receiving portion. A discharge port for discharging to the input port, and a rotary vane portion rotatably provided on the bottom surface of the outer cylinder portion to send the material contained through the gap to the outer peripheral portion of the receiving portion and guide the material to the discharge port. The cored wire manufacturing apparatus according to claim 2 or 3, which is a feeder having the above.
The cored wire manufacturing apparatus according to any one of claims 1 to 4, wherein the main body portion has an inner surface inclined toward the center at an angle larger than the angle of repose of the additive with respect to a horizontal plane.
The second discharge port has a tapered shape, the lower end portion thereof is close to the opening of the covering material in the molding portion, and the additive is used in a state where a predetermined amount of the additive is deposited on the main body portion. The cored wire manufacturing apparatus according to any one of claims 1 to 5, which is filled in a covering material.
The control device further has a molding condition recording unit that records the molding speed and the molding length of the cored wire molded by the molding unit, and the molding condition recording unit molds from the molding speed and the molding length. By calculating the time and making the calculated molding time correspond to the calculated molding time based on the predetermined time, the filling amount of the additive and / or the mixing ratio of one raw material to the additive at a predetermined position of the molded cored wire. The cored wire manufacturing apparatus according to any one of claims 1 to 6.
The cored wire manufacturing apparatus according to any one of claims 1 to 7, wherein the first raw material is a granular mixture of Fe—Si and other alloys, and the second raw material is a powder of Mg.
A method for manufacturing a cored wire using the cored wire manufacturing apparatus according to any one of claims 1 to 8.
The first raw material and the second raw material are housed in each hopper of the hopper group.
The first raw material and the second raw material are discharged from each hopper in a fixed amount to the first inlet, and the weight of the entire hopper is measured at predetermined time intervals.
The additive is produced by dropping the first raw material and the second raw material charged into the first charging port to the first discharging port while colliding the inside of the stirring portion with the plurality of inclined surface portions.
The additive discharged from the first discharge port is conveyed to the second input port in predetermined amounts by the bucket.
The additive conveyed to the second charging port is guided to the molding portion by the main body portion, and is also guided to the molding portion.
A method for producing a cored wire, which monitors the filling amount of the additive in the coating material and / or the mixing ratio of one raw material in the additive based on the weight of the entire hopper measured at predetermined time intervals.