JP3697206B2 - Composite metal member manufacturing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for manufacturing a composite metal member in which a metal or an alloy different from a material of a base material plate on the surface of the base material plate is welded as a single layer or a reverse layer.
[0002]
[Prior art]
In order to protect or repair a worn portion, for example, a composite metal member in which a surface of a base plate made of steel is coated with a wear-resistant metal or alloy is generally used. For the metal or alloy coating, for example, a welding method is used in which atomized powder is heated and welded in a state where the powder is placed on the surface of the base material plate.
In order to prevent sag (corner chipping) of the weld metal and efficiently perform welding at both ends in the width direction of the composite member obtained by the welding method, a manufacturing apparatus 30 shown in FIGS. There has been proposed a method for manufacturing a composite metal member using the above.
[0003]
As shown in FIGS. 4A and 4B, the manufacturing apparatus 30 includes a pair of conveying rollers 31 and 32 that are divided into left and right, a high-frequency induction coil 40 that is positioned between them, and the coil 40. A pair of dam plates 38, 38 that pass through the inside and are supported by the conveying rollers 31, 32 at both ends, and a long base material that is conveyed on the conveying rollers 31, 32 and passes between the dam plates 38, 38. And a hopper 44 for supplying the metal powder P on the surface of the plate 39. The transport rollers 31 and 32 are each provided with a plurality of rollers 34 that are driven or driven to rotate between a pair of horizontal frames 33 and 33. In FIGS. 4A and 4B, the transport rollers 31 on the upstream side are arranged. A base material plate 39 is placed on the top.
[0004]
As shown in FIGS. 4A and 4B, between the transport rollers 31 and 32, the smaller the diameter toward the right inlet 41, the smaller the diameter and the narrower the pitch, the larger the distance toward the left outlet 42, the larger the diameter and wide pitch. The high-frequency induction coil 40 is disposed so that the whole of the coil is substantially in a trumpet shape. A pair of weir plates 38, 38 facing each other along the axial direction penetrates the inside of the coil 40. The dam plates 38, 38 are formed of a long plate material such as heat-resistant steel or ceramic, and both ends in the longitudinal direction thereof are provided on horizontal pins 35, 35 protruding from the frames 33, 33 of the transport rollers 31, 32. The supported weir plates 38 and 38 are pressed in the horizontal direction so as to approach each other while being supported by the frames 33 and 33 via the wound coil springs 36 and 36.
[0005]
The pins 35 and the coil springs 36 are disposed between the rollers 34 and 34 of the transport rollers 31 and 32 or at the ends of the frames 33 and 33, and the pair of barrier plates 38 and 38 are respectively connected to the rollers 34 and 34. It is arranged at a higher position. 4A and 4B, a hopper 44 filled with metal powder P is disposed above the upstream conveying roller 31 and between the weir plates 38, 38. The powder supply port 46 located at the lower end of the base plate 39 is disposed to face the base material plate 39. On the downstream side of the supply port 46, a leveling plate 48 that can be moved up and down by a lifting mechanism (not shown) is disposed.
[0006]
As shown in FIG. 4 (B), the metal powder P dropped onto the base material plate 39 conveyed from the right side to the left side is leveled by the leveling plate 48 and the weir plates 38, 38 on both sides. The inner side of the high frequency induction coil 40 is moved horizontally together with the base material plate 39 while being sandwiched between the two. During this time, for example, an eddy current flows on the surface of the base plate 39 due to the electromagnetic induction of the coil 40 through which a high frequency current of 300 KHz flows, so that the base plate 39 generates heat. After the metal powder P is heated and melted by heat transfer from the base material plate 39, direct heating from the coil 40 by Joule heat is started.
[0007]
By the way, when the penetration depth (heating depth) of the eddy current in the base material plate 39 becomes deep, the heat transfer speed into the base material plate 39 becomes equal to or higher than the endothermic speed of the powder P. There was a problem that the temperature rise of the material plate 39 was accelerated and could melt faster than the powder P.
Since the penetration depth of the eddy current is inversely proportional to the frequency of the high frequency current flowing through the high frequency induction coil 40, the penetration depth becomes shallower as the frequency of the current increases. For this reason, in order to prevent melting of the base material plate 39 described above, the frequency of the coil 40 applied to the welding of the powder P is generally 300 to 400 KHz where the penetration depth is shallow. As a result, for example, when coating a Fe-based weld metal having a thickness of about 2 to 3 mm, the conveying speed of the base plate 39 is as low as about 100 to 120 mm / min, so the productivity of the composite metal member is lowered. There was also a problem of high costs.
[0008]
[Problems to be Solved by the Invention]
The present invention solves the problems in the prior art described above, and a composite metal member in which a metal powder to be welded can be melted faster than a base plate and a composite metal member can be produced efficiently and at low cost. It is an object of the present invention to provide a manufacturing apparatus.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is based on the results of diligent research and experiments by the inventors, and divides the high-frequency induction coil into a plurality of parts and makes the penetration depth of the eddy current formed by these into the base material plate different. The idea was made with the idea.
That is, the composite metal member manufacturing apparatus of the present invention (Claim 1) includes a plurality of high-frequency induction coils having different frequencies and a base material placed on the front and rear along the axial direction of the coils and on which metal powder is placed. A conveying means for conveying the plate through the inside of the high-frequency induction coil, and among the high-frequency induction coils, the high-frequency induction coil closer to the upstream in the conveying direction of the base material plate has a relatively high frequency, And the high frequency induction coil near the downstream has a relatively low frequency.
[0010]
According to this, since the upstream high frequency induction coil has a relatively high frequency, an eddy current with a shallow penetration depth is formed near the surface of the base plate, and the metal powder is heated by the heat generated by the base plate. And part begins to melt. Next, since the downstream high-frequency induction coil has a relatively low frequency, an eddy current having a deep penetration depth is formed in the molten (welded) metal melted from the metal powder, and it is melted by Joule heat generated by the resistance of the eddy current. The metal itself is heated directly. For this reason, the amount of heat generated by the molten metal is increased and the remaining metal powder is also heated and melted. As a result, the entire metal powder is rapidly melted and rapidly heated by Joule heat based on the coil, so that a composite metal member in which a uniform weld metal layer is coated on the surface of the base metal plate is quickly formed. Easy to do. In addition, since the base material plate is difficult to be heated up to the inside, it is possible to reliably prevent the base material plate from melting faster than the metal powder.
[0011]
The upstream and downstream high-frequency induction coils are relative names in the conveying direction of the base material plate, and the coils are divided into two or more stages along the conveying direction. It represents a plurality of high-frequency induction coils. Further, the frequency of the high frequency induction coil indicates the frequency of the current passed through the coil.
Furthermore, in order to improve wear resistance, corrosion resistance, heat resistance, etc., the metal powder supplied on the surface of the base plate is similar to hard metal or alloy, corrosion resistance or heat resistant metal or alloy, and the like. Also included are composites comprising metals and ceramics that can be improved, such as cermets and sialons.
In addition, the supply position of the metal powder is between a pair of weir plates that sandwich the base material plate from both sides while penetrating the inside of each of the high frequency induction coils, upstream of the high frequency heating coil, and the weir. It is desirable to be the front end side between the plates.
[0012]
Further, according to the present invention, the frequency of the upstream high-frequency induction coil is 100 to 200 KHz, and the frequency of the downstream high-frequency induction coil is 50 to 150 KHz, and between the frequencies of the upstream and downstream coils. The difference includes a manufacturing apparatus (Claim 2) of the composite metal member which is 40 KHz or more.
According to this, compared to the frequency of 300 to 400 KHz in the conventional manufacturing apparatus 30, the surface layer of the base material plate is heated by the high frequency induction coil at a lower frequency and closer to the upstream of 100 to 200 KHz to rapidly move the metal powder. Heat to. Next, the molten (welded) metal itself in which the metal powder is melted is deeply heated by a high-frequency induction coil near 50 to 150 KHz. Moreover, the remaining metal powder and the entire molten metal can be quickly heated and coated on the surface of the base metal plate by the heat transferred from the base metal plate and the Joule heat of the molten metal itself in which the metal powder has melted. it can.
[0013]
When the frequency of the upstream high-frequency induction coil is, for example, 100, 150, and 200 KHz, the frequency of the downstream high-frequency induction coil is preferably 50, 100, and 150 KHz, and a difference of 50 KHz (40 KHz or more). .
Moreover, the frequency of each coil is set in the range of 50 to 200 KHz. If the frequency is less than 50 KHz, stable control is difficult to obtain. On the other hand, if the frequency exceeds 200 KHz, the penetration depth of the eddy current becomes too shallow, and metal powder or molten metal This is because the heating rate decreases. Furthermore, the difference in frequency between the upstream and downstream coils is set to 40 KHz or more, and if it is less than this, the difference in the penetration depth of the eddy current generated in the molten metal in which the base metal plate and the powder are melted is too small. This is because the base metal plate may be heated deeply or the molten metal may be heated shallowly.
In other words, in the form in which the high-frequency induction coil has three stages upstream, midstream, and downstream, the frequencies of the coils are, for example, 100 to 200 KHz upstream, 100 to 150 KHz midstream, and 50 to 100 KHz downstream. And the difference between frequencies in adjacent coils can be set to 40 KHz or more.
[0014]
Furthermore, the present invention measures the temperature of the metal powder or weld metal on the base metal plate heated by the upstream coil between the upstream high frequency induction coil and the downstream high frequency induction coil. An apparatus for manufacturing a composite metal member (claim 3) in which temperature measuring means is further arranged is also included.
According to this, by measuring the temperature of the metal powder or weld metal heated by the upstream coil, and detecting the overheating or underheating, the output to the power supply device of the downstream high frequency induction coil It is possible to easily perform feedforward control to increase or decrease the. This makes it possible to more reliably and stably manufacture a composite metal member in which a desired metal or alloy is deposited on the surface of the base material plate. It is also possible to perform feedback control for increasing or decreasing the output of the upstream high frequency induction coil in accordance with the temperature measurement result.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
In the following, preferred embodiments of the present invention will be described with reference to the drawings.
1A and 1B show a plan view and a vertical sectional view of a composite metal member manufacturing apparatus 1 according to the present invention. As shown in FIGS. 1 (A) and 1 (B), the manufacturing apparatus 1 includes a pair of conveying rollers (conveying means: roller conveyors) 2a and 2b that are divided into left and right, and a high-frequency induction coil positioned between them. 10 and a pair of barrier plates 8a, 8b penetrating the inside of the coil 10 and supported at both ends by the transport rollers 2a, 2b, and transported on the transport rollers 2a, 2b and between the barrier plates 8a, 8b. And a hopper 14 for supplying the metal powder P onto the surface of the long base plate 18 that passes therethrough.
The transport rollers 2a and 2b each have a plurality of rollers 4, 4... That are driven or driven to rotate between a pair of horizontal frames 3 and 3, respectively. In FIGS. The base material plate 18 is placed on the transport roller 2a on the) side.
[0016]
A hopper 14 filled with metal powder P is disposed above the upstream conveying roller 2a and between the pair of weir plates 8a and 8b, and the powder supply port 15 located at the lower end thereof faces the base material plate 18. Are arranged. On the downstream side of the supply port 15, a leveling plate 16 that can be raised and lowered by an elevating mechanism 20 described below is disposed.
As shown in FIG. 2A, the lifting mechanism 20 for the leveling plate 16 has a bearing 21 fixed on the downstream side of the powder supply port 15 located at the lower end of the hopper 14 and is rotatably supported by the bearing 21. And a handle 24 fixed to the upper end of the bolt 22, and a nut 23 to be screwed at the lower end of the bolt 22. The nut 23 is fixed to the center of the side surface of the wide leveling plate 16.
[0017]
Further, guide pins fixed vertically on the right and left of the leveling plate 16 are attached to the rings 26 and 26 fixed to the ends of a pair of symmetrical horizontal bars 27 and 27 protruding obliquely downstream from the supply port 15 of the hopper 14. 25, 25 penetrates. Therefore, by rotating the handle 24 and rotating the bolt 22, the leveling plate 16 can be moved up and down along the direction of the arrow in FIG. As a result, as shown in FIG. 1A, the metal powder P immediately after being dropped from the supply port 15 can be leveled to a desired uniform thickness on the surface of the base plate 18.
[0018]
As shown in FIG. 1A, the leveling plate 16 is flat and has a required thickness of the surface of the metal powder P dropped on the surface of the base material plate 18 conveyed leftward on the conveying roller 2a. Level. Further, the leveling plate 16 is positioned upstream of the pair of dam plates 8a and 8b, and is positioned directly above the base material plate 18 which is conveyed while contacting both sides of the dam plates 8a and 8b. For this reason, the metal powder P can be supplied in a desired thickness through a rectangular space surrounded by the base material plate 18, the pair of weir plates 8 a and 8 b, and the leveling plate 16.
[0019]
As shown in FIGS. 1A and 1B, the high-frequency induction coil 10 disposed between the transport rollers 2a and 2b is located upstream in the transport direction of the base plate 18 and has a relatively high frequency (for example, 100 KHz) induction coil 11 and a relatively low frequency (for example, 50 KHz) induction coil 12 that is located on the downstream side. The coils 11 and 12 are spirally wound with a substantially square cross section.
As shown in FIG. 1A, power supply devices (transistor inverters) 13a and 13b are individually connected to the high-frequency induction coils 11 and 12, respectively. Power supply devices 13a and 13b have a frequency of 20 to 250 KHz, a power capacity of 1000 Kw, a power control method: a frequency amplitude modulation method, a control speed of 0.01 seconds, a total conversion efficiency of 96% (at the rated output), and a power adjustment. : By inverter phase control (γ angle).
[0020]
Inside the high frequency induction coils 11 and 12, a pair of weir plates 8a and 8b which opposes along the axial direction penetrates. The dam plates 8a and 8b are formed of a long plate material such as heat-resistant steel or ceramic, and cooling water is forcedly circulated therein.
As shown in FIGS. 1 (A) and 2 (B), both end portions in the longitudinal direction of the barrier plates 8a and 8b are connected to horizontal pins 5 and 5 protruding from the frames 3 and 3 of the transport rollers 2a and 2b. The dam plates 8a and 8b which are supported by the frames 3 and 3 via the wound coil springs 6 and 6 and are opposed to each other are pressed in the horizontal direction so as to approach each other.
The pin 5 and the coil spring 6 are disposed between the rollers 4 and 4 of the transport rollers 2a and 2b or at the ends of the frames 3 and 3, and the pair of dam plates 8a and 8b are respectively connected to the rollers 4 and 4. It is arranged at a position higher than.
[0021]
As shown in FIGS. 1 (A) and 1 (B), a radiation thermometer (temperature measuring means) 19 is obliquely downward toward the vicinity of the exit of the high frequency induction coil 11 above the high frequency induction coils 11 and 12. It is arranged with the posture. The radiation thermometer 19 detects the amount of heat energy from infrared rays emitted from the weld metal M formed on the surface of the base metal plate 18 by the coil 11, and measures the temperature of the weld metal M based on this. Is.
As shown in FIG. 1A, the electrical (temperature) signal from the radiation thermometer 19 is transmitted to the power supply device 13b of the high-frequency induction coil 12 closer to the downstream, and is compared with reference data by a calculation unit (not shown). In the case of overheating or underheating, feedforward control for adjusting the power supplied from the power supply device 13b is performed.
In addition, it is also possible to perform independent feedback control for adjusting the power supplied from the radiation thermometer 19 to the power supply device 13a of the upstream high frequency induction coil 11 or in parallel with the feedforward control. is there. Further, the power supply devices 13a and 13b can be controlled to input heat by PID control.
[0022]
Below, the usage method of the manufacturing apparatus 1 mentioned above is demonstrated.
As shown in FIG. 3 (A), the metal powder P having a uniform thickness on the surface of the base material plate 18, together with the base material plate 18, passes a pair of weirs inside the high frequency induction coil 11 closer to the upstream. It penetrates in a state sandwiched between the plates 8a and 8b. In the vicinity of the coil 11, eddy current having a shallow penetration depth is generated on the surface of the base material plate 18 by electromagnetic induction of the coil 11 through which a high frequency current of 100 KHz flows, for example, and the base material plate 18 is heated. As shown in FIG. 3B, the metal powder P heated by the heat transferred from the base material plate 18 is in a molten state and is welded to the surface of the base material plate 18 as a weld metal M. It is conveyed sequentially toward the exit.
[0023]
As shown in FIG. 3 (B), a radiation thermometer 19 is interposed between the high frequency induction coils 11 and 12, and heat energy is generated from infrared rays or the like emitted from the weld metal M formed on the surface of the base plate 18 by the coil 11. The amount is detected, and the temperature of the weld metal M is measured based on this amount. The signal from the radiation thermometer 19 is sent to the power supply device 13b. For example, when the temperature of the weld metal M is lower than the reference data, the power supplied from the power supply device 13b to the coil 12 closer to the downstream is increased. Feed forward control is performed.
In the above case, a signal from the thermometer 19 is sent to the power supply device 13a to increase the power supplied from the power supply device 13a to the upstream coil 11, and PID control is applied to the power supply devices 13a and 13b. It is also possible to perform.
[0024]
As shown in FIG. 3C, the base material plate 18 having the weld metal M in the molten state on the surface is in a state where the inner side of the high-frequency induction coil 12 closer to the downstream is sandwiched between a pair of weir plates 8a and 8b. It penetrates with. In the vicinity of the coil 12, an eddy current having a deep penetration depth is formed in the weld metal M in a molten state by electromagnetic induction of the coil 12 in which a high-frequency current of 50 KHz flows, for example. The weld metal M is directly heated by Joule heat generated by resistance to the eddy current. As a result, the weld metal M is rapidly heated and welded to the surface of the base material plate 18, and is sent from the high frequency induction coil 12 closer to the downstream to the conveying roller 2 b side.
Incidentally, since the penetration depth (δ) of the eddy current is inversely proportional to the square root of the frequency, in the case of ordinary steel, it becomes 2.5 mm at a frequency of 50 KHz, 1.7 mm at a frequency of 100 KHz, and 1.0 mm at a frequency of 300 KHz.
[0025]
As shown in FIGS. 3 (B) and 3 (C), the metal powder P dropped on the surface of the base material plate 18 is conveyed together with the base material plate 18 while both sides thereof are regulated by the weir plates 8a and 8b. It is heated and begins to melt by receiving heat transferred from Joule heat generated by resistance to the eddy current having a shallow penetration depth formed in the base material plate 18 by electromagnetic induction of the high-frequency coil 11 closer to the upstream. Next, an eddy current having a deep penetration depth is formed in the weld metal M by electromagnetic induction of the high-frequency coil 12 closer to the downstream side, and the weld metal M is directly heated by Joule heat due to resistance to the eddy current. M is rapidly heated and welded and coated on the surface of the base material plate 18. Therefore, a composite metal member made of the same metal or alloy as the metal powder P and having the desired thickness of the weld metal M coated on the surface of the base material plate 18 can be produced efficiently and reliably in a short time.
[0026]
Incidentally, when the high Cr cast iron-based powder P is coated on the surface of the base metal plate 18 made of ordinary steel as the weld metal M having a thickness of 3 mm, the upstream coil 11 is set to 100 KHz in the manufacturing apparatus 1 and the downstream side. When the close coil 12 was set to 50 KHz, the conveyance speed of the base material plate 18 was about 600 mm / min.
On the other hand, when the conventional manufacturing apparatus 30 shown in FIGS. 4A and 4B and the base material plate 39 having the same material and size as described above are used and the frequency of the induction coil 40 is 300 KHz, the base material The conveying speed of the plate 39 was 100 to 120 mm / min.
From the above results, the effect and superiority of the composite metal member manufacturing apparatus 1 according to the present invention were sufficiently confirmed.
[0027]
When two or more weld metal layers M are to be formed, the base plate 18 on which the single weld metal layer M is formed is again placed on the upstream side located on the right side of FIGS. 1 (A) and 1 (B). The same or different kind of metal powder P is placed from the hopper 14 and moved between the pair of weir plates 8a and 8b in the same manner as described above, and placed on the transport roller 2a, and the high frequency induction coil 10 (11, 12). ) Is penetrated inside. Thereby, for example, it is possible to efficiently manufacture a composite metal member made of, for example, the same kind of metal or alloy and having a uniform thickness on the surface of the base plate 18 with a weld metal layer M having a thickness of 4 mm or more.
[0028]
Further, a composite made of different metals or alloys and having a plurality of deposited metal layers M coated with a uniform thickness with two or more layers closer to the surface or outer side (surface layer) of the base material plate 18 depending on the characteristics. It is also possible to manufacture a metal member. Further, when the base material plate 18 having slightly different width dimensions is used, the base plate 18 can be used in the same manner as described above while the weir plates 8a and 8b are pressed through the coil spring 6. However, when using a base material plate 18 having a considerably different width dimension, the coil spring 6 is removed from the pin 5 and replaced with another coil spring 6 having an appropriate axial length and elasticity.
[0029]
The present invention is not limited to the embodiments described above.
For example, the conveying means is not limited to the conveying roller, but may be a belt conveyor or a mesh conveyor. In addition, the conveying direction of the base material plate may be an oblique direction in which the base plate is gently lowered from the upstream side toward the downstream side through the high-frequency induction coil 10. In addition to the elevating mechanism 20, for example, a hoisting mechanism using a hydraulic cylinder, a wire, or a chain can be applied to elevate and lower the leveling plate 16.
Furthermore, a manufacturing apparatus having a configuration in which a plurality of the hoppers 14 and a plurality of sets of the high-frequency induction coils 10 (11, 12) are alternately arranged along the conveying direction of the base material plate 18 may be employed. According to this, by sequentially supplying and welding different metal powders P, it is possible to continuously and efficiently manufacture a composite metal member in which a plurality of weld metal layers are formed.
[0030]
Further, the heat-resistant metal member 29 indicated by a one-dot chain line in FIG. 2B may be disposed between the high-frequency induction coil 11 on the upstream side and the base material plate 18 to be conveyed. The heat-resistant metal member 29 is made of, for example, a plate material such as JIS: SUH3, and the Joule heat due to the resistance to the eddy current having a shallow penetration depth generated on the surface due to the electromagnetic induction of the upstream coil 11 is applied to the base material plate 18. Radiates to the metal powder P as radiant heat. Thereby, the heating of the powder P can be accelerated. The heat-resistant metal member 29 may be a flat plate material, an uneven plate in which a plurality of ridges and grooves are alternately formed, and may be arranged to be inclined with respect to the feed direction of the base material plate 18. .
For example, a CCD camera including an element that converts the lightness and color of the surface of the weld metal into an electrical signal corresponding to the temperature may be used as the temperature measuring means.
[0031]
【The invention's effect】
According to the composite metal member manufacturing apparatus of the present invention described above (Claim 1), an eddy current having a shallow penetration depth is formed near the surface of the base metal plate by a high frequency induction coil having a relatively high frequency upstream. Is formed, and the metal powder is heated and part of the base metal plate starts to melt. Also, due to the relatively high frequency induction coil near the downstream, an eddy current with a deep penetration depth is formed in the molten (welded) metal melted from the metal powder, and the eddy current generated by the resistance of the eddy current directly Due to the heating, the amount of heat generated by the molten metal is increased and the remaining metal powder is also heated and melted. Accordingly, since the entire metal powder is melted and rapidly heated by Joule heat based on the coil, it is possible to quickly form a composite metal member in which a uniform weld metal layer is coated on the surface of the base plate. It becomes easy. In addition, since the base material plate is difficult to be heated up to the inside, it is possible to reliably prevent the base material plate from melting faster than the metal powder.
[0032]
Further, according to the manufacturing apparatus of claim 2, since the upstream and downstream high-frequency induction coils, which are both lower than the conventional frequency, are used, the upstream coil has a shallow penetration from the eddy current into the base metal plate. The metal powder is heated by the transfer heat, and the weld metal that has started to melt in the downstream coil can be rapidly heated directly by Joule heat. Therefore, it is possible to efficiently manufacture the composite metal member while preventing the base material plate from melting.
Furthermore, according to the manufacturing apparatus of claim 3, by measuring the temperature of the metal powder or weld metal heated by the upstream high frequency induction coil and detecting the overheating or underheating, the downstream high frequency induction It is possible to easily perform feedforward control for increasing or decreasing the output of the coil power supply. As a result, it becomes possible to more reliably and stably manufacture a composite metal member in which a desired metal or alloy is deposited on the surface of the base material plate.
[Brief description of the drawings]
FIG. 1A is a plan view showing a composite metal member manufacturing apparatus according to the present invention, and FIG. 1B is a cross-sectional view taken along a line BB in FIG.
2A is a schematic view showing a leveling plate lifting mechanism used in the manufacturing apparatus of FIG. 1, and FIG. 2B is a vertical sectional view showing the vicinity of an end portion of a weir plate in the manufacturing apparatus of FIG.
FIGS. 3A to 3C are schematic views showing how to use the manufacturing apparatus of FIG.
4A is a plan view showing a conventional composite metal member manufacturing apparatus, and FIG. 4B is a cross-sectional view at a viewing angle along the line BB in FIG. 4A.
[Explanation of symbols]
1 ……………………………… Composite metal member manufacturing equipment
2a, 2b …………………… Conveying roller (conveying means)
10 ……………………………… High-frequency induction coil
11 …………………………… High-frequency induction coil on the upstream side
12 …………………………… High-frequency induction coil closer to the downstream
18 ……………………………… Base material board
19 ……………………………… Radiation thermometer (temperature measuring means)
P ……………………………… Metal powder
M ……………………………… Welding metal / molten metal

Claims (3)

A plurality of high-frequency induction coils having different frequencies, and a conveying means that conveys a base material plate that is disposed before and after the axial center direction of the coil and on which metal powder is placed, through the inside of the high-frequency induction coil; With
Among the high-frequency induction coils, the high-frequency induction coil closer to the upstream in the conveying direction of the base plate has a relatively high frequency, and the high-frequency induction coil closer to the downstream has a relatively low frequency. Metal member manufacturing equipment. The frequency of the upstream high frequency induction coil is 100 to 200 KHz, the frequency of the downstream high frequency induction coil is 50 to 150 KHz, and the difference between the frequencies of the upstream and downstream coils is 40 KHz or more. The composite metal member manufacturing apparatus according to claim 1, wherein the composite metal member manufacturing apparatus is provided. Between the upstream high-frequency induction coil and the downstream high-frequency induction coil, temperature measuring means for measuring the temperature of the metal powder or the weld metal on the base plate heated by the upstream coil is further disposed. ing,
The manufacturing apparatus of the composite metal member according to claim 1 or 2.

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