TWI254750B - Method and apparatus for covering self-fluxing alloy on inner surface of metal cylindrical body - Google Patents

Abstract

To provide a technology of performing a roll-a-die self-fluxing alloy covering that self-fluxing alloy powder is charged in a cylindrical body, the powder is once heated and melted to perform the self-fluxing alloy covering on an inner surface of the cylindrical body while rotating the cylindrical body without generating any covering thickness deviation in the axial direction of the cylindrical body. The self-fluxing alloy powder 2 of the quantity equivalent to the covering thickness is charged in the horizontally placed cylindrical body 1 and uniformly in the axial direction of the cylindrical body. A powder layer without little thickness deviation in the axial direction and the circumferential direction of the cylindrical body is formed and fitted to an inner surface of the cylindrical body by accelerating the cylindrical body 1 in a short time to the rotational speed to generate the centrifugal force of >= 3G in the powder inside the cylindrical body, the entire cylindrical body is heated while continuing the rotation of the cylindrical body, and the powder in the cylindrical body is heated and melted to perform the self-fluxing alloy covering.

Description

1254750 A7 _ B7 V. EMBODIMENT OF THE INVENTION (1) The present invention relates to a metal cylinder such as a resin molding machine cylinder or a steel pipe for mortar transportation, which is resistant to wear and corrosion. The technology of coating with molten alloy and high productivity and excellent quality. [Prior Art] Conventionally, a typical technique of applying a self-fluxing alloy coating on the inner surface of a metal cylinder is as follows. That is, the cylinder containing the self-fluxing alloy powder corresponding to the thickness of the coating is placed laterally, and the powder in the cylinder is heated and melted while rotating the cylinder at a speed that accelerates the centrifugal force. The inner surface of the cylinder integrally forms a solution layer of the self-fluxing alloy, and then enters the cooling stage in a state of continuous rotation to solidify the molten layer to form a coating technique (for example, refer to Japanese Patent Laid-Open No. 9 6 3 6 3 Bulletin). Here, as a method of heating and melting (and then solidifying) the powder in the cylinder, as disclosed in the above publication, one of the following methods is selected: (a) the heating means is continuously moved from one end of the cylinder to the other end. A continuous manner in which the powder in the cylinder is melted in a differential manner (following solidification); (b) a manner in which the entire body of the cylinder is simultaneously heated and the heating means is used to simultaneously melt the powder in the cylinder (and then simultaneously solidify together). In (a) and (b), there are the following advantages and disadvantages. First of all, (a) the advantage of the continuous mode is that it is provided with a ring-shaped inductor coil that is required to inductively heat the axial direction of the cylinder and a small-scale high-frequency power supply device for supplying power thereto and a simple device for rotating the cylinder. ____^4 This paper scale applies to China National Standard (CNS) A4 specification (210X 297 mm) (please read the notes on the back and fill out this page)

Installation. Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printing 1254750 Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printing A7 B7 V. Invention Description (2) Application. On the other hand, the disadvantage is that it is a form of high operation rate in a small-scale apparatus, so that it takes time to produce, and in addition, it is particularly troublesome in order to prevent thermal deformation due to local heating and cooling, so that the cost is likely to become high. . Secondly, the advantage of the (b)-secondary method is that it can be produced in a short time before and after 1 / 5 of the above-mentioned continuous mode. In addition, the whole simultaneous heating and cooling are carried out, so that it is less prone to thermal deformation and can avoid high cost. . On the other hand, the disadvantage is that it takes a relatively large number of young induction coils and large-scale power supply equipment to heat the entire length of the cylinder, or a large-capacity combustion device or a heating furnace, which tends to cause thickness deviation in the axial direction of the cylinder when the construction is thickly coated. In order to correct this deviation, there will be an extra cost. Of course, the cost of large-scale equipment is balanced by the amount of production of the same scale. Therefore, if the above-mentioned problem of thickness deviation of the coating is solved, the one-time method will become a favorable method of high productivity. [Problem to be Solved by the Invention] The present invention has been made in view of the above problems, and an object thereof is to provide a method in which a self-fluxing alloy powder is placed in a cylinder to rotate the cylinder while the powder is simultaneously heated and melted and in the cylinder. The surface is coated with a self-fluxing alloy, and is coated with a self-fluxing alloy in a single manner, and a technique of not causing variation in the thickness of the coating is performed in the axial direction of the cylinder. [Means for Solving the Problem] The present invention has been made to solve the above problems, and is a fusion coating method in which a self-fluxing alloy is applied to a metal cylinder inner surface, which is characterized by -'- ----- --- 5 -__ This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) (please read the notes on the back and fill out this page)

1254750 A7 B7 V. INSTRUCTIONS (3) Ministry of Economic Affairs, Smart Finance, 4th Bureau, Staff Cooperatives, Co., Ltd. Prints the following self-fluxing alloy coating method for the inside of the metal cylinder that is operated in the following order: The inner surface of the cylinder placed in the lateral direction will be equivalent to the coating. The self-fluxing alloy powder forming the thickness is uniformly arranged in the axial direction of the cylinder; the cylinder is rotated around the axis thereof to achieve a rotational speed of generating a centrifugal force of 3 G or more, and the powder in the cylinder is distributed throughout the circumference of the cylinder The shape of the direction is in close contact with the inner surface of the cylinder, and at this time, the time for achieving the rotational speed of the centrifugal force of 3 G or more is generated, and the movement of the powder in the axial direction of the cylinder in the axial direction of the cylinder can be suppressed for a short period of time. a powder layer having almost no deviation thickness is formed in the axial direction and the circumferential direction of the cylinder to be in close contact with the inner surface of the cylinder; in order to continuously rotate the cylinder, the cylinder is heated at the same time to heat the cylinder to melt the powder in the cylinder at the same time And maintaining a molten state; entering the cooling stage in a state of continuously rotating the cylinder to solidify the self-melting alloy melted in the cylinder; The above-described operation sequence, the self-fluxing alloy is melted in the cylinder once the entire surface of the self-fluxing alloy coating formed almost without deviation in the cylinder axis direction and the circumferential direction. Namely, according to the method of the present invention described above, the self-fusing alloy formed on the inner surface of the cylinder is coated, and it is not necessary to correct the variation in thickness. According to the method of the present invention, the reason why the coating deviation is eliminated can be estimated as follows. First, when the self-fluxing alloy powder is applied to the inner surface of the cylinder by centrifugal force, as shown in Fig. 5, the position of the ground in the circumferential direction of the rotating cylinder 1 is along the direction of rotation of the cylinder. Clock scale (example (please read the notes on the back and fill out this page)

Order

This paper scale applies to China National Standard (CNS) A4 specification (210X 297 mm) 1254750 Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printed A7 B7 V. Invention description (4) For example, 3°, 6°, 9°, 12 . Etc.), and the gravitational acceleration applied by the powder in the cylinder at 3°, 6°, 9°, and 12° is represented by G3, G6, G9, G", and the gravitational acceleration applied by the powder in the cylinder is For G 3 ~ G ! 2 its 値 all g three 9 8 〇 cm / s 2. Then, since the centrifugal force exerted by the powder exceeds the above g, the G 1 2 is eliminated, so that it is impossible to form a powder drop cause. On the other hand, for the drop caused by the gravity of G3 and G9, the more the centrifugal force increases, the more the frictional force from the centrifugal force becomes larger and cannot be generated, and the gravity itself is not eliminated, so that the powder layer slides in the circumferential direction. . In the middle of 1 2 ° to 3 ° and between 9 ° and 1 2 °, the drop of gravity can be controlled in response to the centrifugal force being partially removed. Although it varies with the surface roughness or powder particle size of the inner surface of the cylinder, it can be seen experimentally that if the centrifugal force is above 3 G, the slipping of the powder layer and the falling of the powder can be substantially ignored. Therefore, the powder adheres to the inner surface of the cylinder in a stationary state. On the other hand, when the centrifugal force is weak at a level of 1 G to 2 G, the powder will temporarily adhere to the inner surface of the cylinder but in the range of 12° to 3° and 9° to 12°, the powder layer will fall and powder. At this time, there is a microscopic directionality such as texture in each part of the inner surface of the cylinder. By summarizing the directionality, it is known that the powder forms a right spiral or a left spiral bolt displacement, and the powder layer is formed. One end moves (otherwise, it can be confirmed that the moving direction changes as the direction of rotation changes). Even when a centrifugal force of 3 G or more is applied, the movement of the powder layer occurs in the 1 G to 2 G stage before the enthalpy is reached. Therefore, ------- . 7 . _ This paper scale applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the notes on the back and fill out this page)

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1254750 A7 B7 Ministry of Economic Affairs Intellectual Property Bureau Employees' Consumption Cooperatives Printing 5, Inventions (5) Even if the powder is uniformly placed in the axial direction in the cylinder, when the cylinder is rotated at a high speed, the internal powder is applied with 3 G or more. When the centrifugal force is accelerated at a slow speed, the operating time of the centrifugal force of 1 G to 2 G is somewhat long, and the powder is moved in the cylinder axis direction at this stage to cause a thickness variation. On the other hand, in the present invention, the acceleration of the centrifugal force of 3 G or more is achieved in a short time, and by shortening the operation time for generating the rotational speed of the centrifugal force of 1 G to 2 G, the powder is prevented from moving in the axial direction of the cylinder. As a result, the powder layer adhering to the inner surface of the cylinder hardly causes thickness deviation in the axial direction of the cylinder, and by heating and melting the powder layer, it is estimated that the coating layer having a thickness substantially unchanged in the axial direction of the cylinder can be formed. Here, the coating layer having almost no variation in thickness means an excessively large deviation state which is not required to be corrected in subsequent processes, that is, the thickness deviation ratio [=丨 (maximum coating thickness - minimum coating thickness) + average coating thickness} χ 1 0 0] Allows the following meanings. At the time of carrying out the above-described method of the present invention, it is preferable to first process the surface roughness of the inner surface of the cylinder into 5 to 2 0 // m R a by performing the above operation (1). As a result of the confirmation by the inventors, the surface roughness affects the movement of the powder in the axial direction of the cylinder during the rotation of the cylinder at a rotational speed of 1 G~2 G, and the surface finish is more precise. When it is processed into 5~2 0 // m R a , it can be clearly seen that the movement of the powder in the axial direction of the cylinder becomes small. Therefore, by first processing the surface roughness of the inner surface of the cylinder to 5 to 20//mRa, it is possible to control the powder which accelerates the centrifugal force of 3 G or more as compared with the case where the surface roughness is smaller. The movement to the axial direction of the cylinder can make the thickness deviation smaller, or -------- This paper scale applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the precautions on the back) Fill in this page)

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1254750 Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printed A7 ____B7 V. Invention description (6) is 'to suppress the same thickness deviation, the acceleration time can be lengthened, so that the requirements of the driving device used for rotating the cylinder can be made The power is reduced, and the device can be miniaturized. The movement of the powder in the direction of the cylinder axis during the rotation of the cylinder at a rotational speed of a centrifugal force of 1 G to 2 G is not limited to the surface roughness, and the inner diameter of the cylinder is also affected. The larger the path, the more it moves. Therefore, for the cylinder in which the surface roughness of the inner surface of the cylinder has been processed to 5 to 2 0 /zmR a , the time from the rotation speed of the centrifugal force of 3 G or more and the inner diameter and the thickness of the coating are obtained experimentally. The relationship between the rates is obtained by the following experimental formula (A) in order to control the thickness deviation rate to the acceleration time r below the allowable enthalpy. Therefore, the cylinder having the surface roughness of the inner surface of the cylinder processed into 5 to 2 0 // mR a is not exceeded in a short time of the time r obtained by the following experimental formula (A). When the above-described rotational speed of 3 G or more centrifugal force is reached and the cylinder is accelerated, a self-fluxing alloy powder layer having a small thickness deviation in the axial direction of the cylinder can be formed on the inner surface of the cylinder. τ = K / Ώ 3 . . . (A) [D is the inner diameter (mm) of the cylinder, K = 3x105 (s·mm3) 1 [Embodiment of the invention] Hereinafter, the implementation of the present invention will be described with reference to the drawings. The form is explained. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic perspective view of a self-fluxing alloy coating device for inner surface of a metal cylinder used in the practice of the present invention, and the second (a), (b), and (c) drawings are tables _-___- Applicable to China National Standard (CNS) A4 specification (210X 297 mm) (Please read the note on the back and fill out this page)

1254750 A7 B7 Ministry of Economic Affairs Intellectual Property Bureau Employees Consumption Cooperatives Printing V. Inventive Note (7) A schematic cross-sectional view showing the sequence of self-fluxing alloy coating on the inner surface of the cylinder by the device of Fig. 1, the symbol 1 is inside. A self-fluxing alloy coated cylinder shall be applied. The tubular body 1 to be coated may be any tubular body as long as it is made of a metal, and a representative example thereof may be a steel pipe such as a cylinder of a resin molding machine cylinder or a steel pipe for mortar transportation. Reference numeral 2 is a self-fluxing alloy powder to be formed to cover the inner surface of the cylindrical body 1. As the self-fluxing alloy to be coated, SFNi 4, SFC〇3, S F W C 2 and the like of J I S8303 can be exemplified. Reference numeral 3 is a cylindrical body supporting and rotating device for supporting the cylindrical body and rotating it, and in this embodiment, is provided with two supporting rollers 4 supporting the lower side of the cylindrical body 1 and the upper side of the pushing cylinder 1 The pressure roller 5 is a driving device (not shown) for rotationally driving the two support rollers 4, and a control device (not shown) for controlling the rotational speed and acceleration of the support roller 4 by the driving device. The control device is configured to control the rotational speed of the cylindrical body 1 to a rotational speed at which a centrifugal force of 3 G or more is generated in a short period of time not exceeding the time r obtained by the above experimental formula (A). Reference numeral 7 is a powder supply device that supplies a self-fluxing alloy powder corresponding to a thickness of a coating to be supported in a cylindrical body 1 supported by the cylindrical body supporting device 3. In this embodiment, the powder is provided from the front end. The powder supply pipe 8 and the feeding cart 9 that can move the powder supply pipe 8 in the tube axis direction are held. Reference numeral 1 1 denotes a heating device for heating the entire length of the cylindrical body 1 supported by the cylindrical body supporting device 3. In this embodiment, the inter-cell induction heating in the circumferential direction of the cylindrical body 1 is applied throughout the entire length of the cylindrical body. The sensor that burns the coil on the surface. - This paper size applies to the Chinese National Standard (CNS) Α4 specification (210X 297 mm) (please read the notes on the back and fill out this page)

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1254750 Printed by the Ministry of Economic Affairs, Intellectual Property Bureau, 8 Workers' Cooperatives A7 B7 V. Description of Invention (8) Next, the method of covering the self-fluxing alloy coating device having the above configuration will be described. First, the cylinder 1 to be covered on the inner surface is prepared, and the surface thereof is machined to a surface roughness suitable for coating. Here, the surface roughness of the inner surface of the cylindrical body 1 is not particularly limited, but is preferably selected to be 5 to 2 0 // mR a . The surface roughness of this range can be easily formed by sandblasting the inner surface of the rinsing inner surface. First, the surface roughness of the inner surface of the cylinder 1 is processed into 5 to 20 // mR a , which has the advantage that the cylinder filled with the self-fluxing alloy powder is rotated at a centrifugal speed of 1 G to 2 G. The movement of the powder in the direction of the cylinder axis during rotation becomes extremely small. The reason for this is that there is an appropriate unevenness on the inner surface of the cylindrical body 1, and it is necessary to retain the powder and suppress the movement of the powder. When the surface roughness of the inner surface of the cylinder is larger, the effect of suppressing the movement of the powder in the axial direction of the cylinder tends to be better. In order to utilize the suppression effect, the surface roughness may be 5 // mR a or more. When this is 2 0 // m R a or more, the effect of suppressing the movement of the powder cannot be expected. On the other hand, the cost of rough surface processing will increase. For this reason, it is preferable to set the upper limit of the surface roughness to 2 0 //mR a . Next, the cylindrical body 1 is disposed in a state in which the cylindrical support rotating device 3 is placed laterally, and the self-fluxing alloy powder corresponding to the thickness of the coating is uniformly disposed on the cylinder axis in the cylindrical body 1 placed laterally. Directional operation. Specifically, the powder supply tube 8 of the powder supply device 7 is inserted into the cylindrical body 1, and a predetermined amount of the self-fluxing alloy powder 2 is placed in the direction of the inner axis of the cylindrical body 1 (refer to Fig. 2(a)). The part (in one or more places), and then the powder supply tube 8 is taken out, and both ends of the barrel 1 are closed with a suitable outer cover (not shown), and then the powder in the barrel 1 is not ( Please read the notes on the back and fill out this page.)

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This paper scale applies to China National Standard (CNS) A4 specification (210X 297 mm) 1254750 Ministry of Economic Affairs Intellectual Property Bureau g (Working Consumer Cooperatives Printed A7 B7 V. Invention Description (9) The cylinder body 1 is distributed over the circumference of the cylinder The slow rotation is performed. By this rotation, the powder 2 loaded in the cylinder 1 is evenly distributed in the axial direction of the cylinder, so that the powder is uniformly arranged in the axial direction of the cylinder [refer to the second (b) In this method, since the powder 1 is loaded with the self-fluxing alloy powder by the powder supply pipe 8, it is not necessary to uniformly load the powder in the axial direction of the cylinder, so that the powder can be easily loaded. In the inside of the cylindrical body 1, the self-fluxing alloy powder corresponding to the thickness of the coating is uniformly disposed in the axial direction of the cylinder, and other methods are not limited to the above method. For example, the powder is supplied by using The tube 8 is inserted into the cylindrical body 1, and the powder is ejected from the front end thereof while moving the feeding cart 9 at a constant speed toward the axial direction of the cylinder, so that the powder is uniformly arranged in the cylinder 1 in the axis. direction In addition, by using the powder supply pipe 8 to be used for loading the cylindrical body 1, a groove-shaped discharge port extending in the axial direction is formed on the side surface thereof, or a plurality of holes arranged in the axial direction are used. The spouter is formed by inserting the self-fluxing alloy powder, which is equal to the axial direction, in the powder supply pipe 8 in a state in which the discharge port is closed or upward, and the powder supply pipe 8 is inserted into the cylindrical body 1, and then the spit is discharged. The method of supplying the self-fluxing alloy powder in the powder supply pipe 8 to the cylindrical body 1 by opening or lowering the outlet may also uniformly distribute the powder in the axial direction in the cylindrical body 1. The self-melting in the cylindrical body 1 After the alloy powder 2 is uniformly disposed in the axial direction of the cylinder, the cylindrical body 1 is rotated about the axis by the cylinder supporting the rotating device 3, and the rotational speed of the centrifugal force of 3 G or more is generated. The self-fluxing alloy powder 2 loaded in the cylinder 1 is equal to the _______V2r. This paper scale applies the Chinese National Standard (CNS) A4 specification (21〇>< 297 mm) (please read the precautions on the back) Fill in this page)

1254750 A7 B7 Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printing 5, invention description (1〇) The circumferential direction of the cylinder, close to the inner surface of the cylinder [refer to Figure 2 (C)]. Then, after the rotational speed at which the centrifugal force of 3 G or more is generated, the powder adhering to the inner surface of the cylinder hardly moves and remains in its position. However, as described above, in the acceleration of the cylinder 1, even if the rotational speed of the centrifugal force of 1 G to 2 G is generated, the powder temporarily adheres to the inner surface of the cylinder, but the restraining force based on the centrifugal force is too small. The microscopic directionality of the inner surface of the cylindrical body 1 causes a spiral displacement of the right helix or the left helix to cause the powder to move in the axial direction of the cylinder, and the thickness deviation in the axial direction of the cylinder tends to occur. Therefore, in order to hardly generate (even if it is generated, within the allowable range), the thickness deviation in the axial direction of the cylinder is accelerated in a short time to achieve a rotational speed at which a centrifugal force of 3 G or more is generated. Specifically, for the cylinder 1 having a surface roughness of 5 to 20//mRa, the rotation speed of the cylinder 1 is not shorter than the time r obtained by the following experimental formula (A). The cylinder 1 is accelerated by the rotation speed at which the centrifugal force of 3 G or more is generated. Thereby, on the inner surface of the cylindrical body 1, a self-fluxing alloy powder layer which is closely adhered to the thickness deviation in the axial direction of the cylindrical body can be formed. The basis of the experimental formula (A) will be described later. r = K / D 3 . · · (A) After reaching the rotational speed at which the centrifugal force of 3 G or more is generated, the cylinder 1 is kept at the same rotational speed, and the rotation is continued, and the cylinder 1 is heated by the heating device 1 1 The powder 2 in the cylinder is kept in a molten state while being melted. Thereby, a molten coating layer of the self-fluxing alloy is formed. Here, the so-called powder melting state does not mean that the powder is completely melted as a whole, but means that at least the powder is partially melted into powders or on the inside of the cylinder - the paper size is applicable to the Chinese National Standard (CNS) Α 4 specification. (210Χ 297 mm) (Please read the notes on the back and fill out this page)

1254750 A7 Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printing _____B7 V. Invention description (11) is the state of fusion. Therefore, the heating temperature of the tubular body 1 by the heating device 11 is selected such that the self-fluxing alloy powder adhering to the inner surface of the cylinder is at least partially melted into a powder or a state in which the inner surface of the cylinder is fused. Specifically, it may be a temperature exceeding the solidus temperature in the state diagram of the self-fluxing alloy. On the other hand, the higher the heating temperature of the cylinder 1, the more the melting ratio of the powder, and finally the state of complete melting. Then, when the powder layer is completely melted, it is considered whether a more dense and non-foaming and pinhole-free molten coating layer can be formed. As a result of confirmation by the inventors of the present invention, it is clear that the powder is not necessarily completely completed. It melts to form a dense, bubble-free or pinhole-free molten coating. In addition, when the powder layer is completely melted, the thickness of the coating layer can be uniformly distributed in the axial direction of the cylinder by the fluidity of the molten layer, so even if the thickness of the powder layer in close contact with the cylinder is deviated, it can be made. Correction, but as long as the powder can be in an unbiased state during the formation period as described above, the correction of the thickness deviation is not required even in the completely molten state. On the other hand, if the powder layer is to be completely melted, the heating temperature of the cylindrical body 1 must be increased. Of course, the heat energy consumption becomes large, and the heating time also becomes long. Moreover, when the liquidus temperature exceeding the self-fluxing alloy is completely melted, the hardness of the metal boride or the metal telluride is solid-solved or oxidized to decrease the hardness as the hardness in the self-fluxing alloy is increased. Disadvantages arise. In view of these, the upper limit of the heating temperature of the cylinder 1 is preferably selected so that the self-fluxing alloy temperature in the cylinder does not exceed the melting-related liquidus temperature of the self-fusing alloy. The time to keep the powder in a molten state is preferably set at 20 to 180 seconds - 44. This paper scale applies to the Chinese National Standard (CNS) A4 specification (210X 297 mm) (please read the back note first) Please fill out this page again)

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1254750 A7 B7 Ministry of Economic Affairs Intellectual Property Bureau g (Working Consumer Cooperatives Printing 5, Invention Description (12). If the time is less than 20 seconds, it will not be able to ensure the fusion of the inner surface of the cylinder, another On the other hand, if it exceeds 180 seconds, physical properties of the self-fluxing alloy may change (for example, changes in physical properties caused by solid solution or oxidation of particles such as metal boride or metal telluride). For these reasons, When the cylinder 1 is heated to melt the powder 2 in the cylinder and maintain the molten state, the heating of the cylinder 1 is such that the temperature of the internal self-fluxing alloy powder exceeds the melting-related solidus temperature of the self-fluxing alloy, but not When the liquidus temperature is exceeded, it is preferable to select the holding time of the above-mentioned molten state to be 20 to 180 seconds, and according to the conditions, a self-fluxing alloy which is free from harmful bubbles or incomplete hardness can be formed. The rotation speed of the cylinder 1 when the powder layer is heated and melted is a rotation speed at which the above-mentioned centrifugal force of 3 G or more is applied. The faster the rotation speed, the larger the centrifugal force is, and the bubble or the pinhole can be self-melted. The molten layer of gold is removed, but if it is a speed higher than a certain speed, it cannot be expected to improve the removal effect. Therefore, as the rotational speed, it is preferable to apply a rotational speed of a centrifugal force of 3 G to 10 G. In particular, it is more preferable to rotate at a centrifugal force of 5 G to 1 〇 G. After the self-fluxing alloy powder is maintained in a molten state for a desired period of time, the cylinder 1 is continuously rotated into a cooling stage to be in the cylinder 1 The molten self-melting alloy is solidified. Although the cooling may be performed by furnace cooling or heat preservation cooling, or any cooling method such as continuous cooling or air cooling, if the cooling rate is too fast, the solidified self-fluxing alloy coating may be due to thermal stress. Therefore, it is expected to be experimentally obtained in a short-time cooling schedule without causing cracking. As described above, the self-fluxing alloy can be melted once in the entire inner surface of the cylinder (please read the back note first) Fill in this page again)

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This paper scale applies to China National Standard (CNS) A4 specification (210X 297 mm) 1254750 A7 B7 Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printing 5, invention description (13) self-fluxing alloy coating, and the resulting self-fluxing alloy In the coating, the thickness deviation of the coating in the axial direction of the cylinder is extremely small. That is, according to this embodiment, the primary self-fluxing alloy can be coated and the thickness of the coating in the axial direction of the cylinder does not vary. In the above embodiment, the heating device 1 1 for heating the tubular body 1 is a linear inductor (face-fired coil) which can simultaneously sense the entire length of the cylinder between the cells in the circumferential direction of the cylindrical body 1. In the inductor 1 1 , the entire length of the cylindrical body 1 can be uniformly heated in a short period of time, and the cylindrical body 1 is rotated at a high speed. As a result, there is an advantage that the entire cylindrical body 1 can be uniformly heated in a short period of time. However, the Garnot device 1 1 that heats the entire length of the cylinder is not limited thereto, and may be appropriately changed. For example, as shown in Fig. 6, the cylindrical body 1 may be arranged to substantially cover the entire length. A multi-turn coil type inductor 1 1 A that simultaneously inductively heats the entire cylinder 1 as a whole. When the multi-turn coil type inductor 1 1 A is used, it is most suitable for a thick-thickness cylinder because of the large amount of input heat. Further, in Fig. 6, since the entire length of the cylinder 1 is supported by the support roller 4 and the pressure roller 5, it must be bent around the outer sides of the support roller 4 and the pressure roller 5, but if the cylinder 1 is supported The mechanism is changed to be supported at both ends of the cylindrical body 1, or to support a plurality of portions away from the axial direction, so that it is not necessary to bend the same, and a plurality of coils of a certain diameter can be used, so that the heating efficiency is good, so that it is preferable. Further, it is advantageous to apply the above-mentioned drum type to a non-magnetic material to make it difficult to inductively heat, and in particular, it is a matter of course in the embodiment of Fig. 6 which is easy to induce induction heating of the drum. As another embodiment of the heating device 1, there is a case where the cells in the circumferential direction of the cylindrical body 1 are simultaneously spread over the entire cylinder (please read the back of the back sheet and fill in this page)

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This paper scale is applicable to China National Standard (CNS) A4 specification (210X297 mm) 1254750 A7 B7 V. Invention description (14) Long heating pipeline burner, more pipe burner with fine heat input and temperature fine adjustment Use a linear sensor for the user. Further, the heating of the tubular body 1 is not limited to the outer side of the cylindrical body 1, and may be performed from the inner side as a spoon-shaped rod-shaped coil (inductor) of this example. Further, it may be changed to heat simultaneously from the inside and the outside of the cylindrical body 1, or when the tubular body 1 is heated, the self-fusing alloy powder layer may be heated by a burner or the like from the inner surface side of the cylindrical body 1. Next, an experiment conducted to calculate the above experimental formula (A) and investigate the influence of the heating temperature on the hardness of the coating will be described. Experiment 1 As the test cylinders A, B, and C, the cylinder 1 of the following specifications was prepared. Test piece A: outer diameter 1 2 5mmx inner diameter 44mmx length 1 2 5 0 mm material: SC Μ 4 1 0 inner surface: sandblasting treatment (inner surface roughness 2 0//mRa) specimen B: outer diameter 125mmx inner diameter 44mmx length 1250 mm Material: SC Μ 4 1 0 Inner surface: sandblasting (internal thickness 5//mRa) Test C: outer diameter 1 2 5mmx inner diameter 44mmx length 1250mm Material: SC Μ 4 1 0 Inside: Polishing (internal thickness 0.5 5//mRa) -----__ This paper scale applies to China National Standard (CNS) A4 specification (210X 297 mm) (please read the notes on the back and fill in This page)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs! 254750 A7 B7 Intellectual Property Office of the Ministry of Economic Affairs g (Printed by the Consumer and Consumer Cooperatives. V. Inventions (15) On the inside of these test cylinders, use Figure 1, The device shown in Fig. 2 is coated with a self-fluxing alloy under the following conditions: Auto-dissolved alloy powder used: HEGANESU (八力'木只) # 1 3 5 5 - 2 0 Solidus temperature ························· °C Liquidus temperature: 1 0 7 0 t: Loaded into powder: Put 2 g of powder into the inside of the cylinder 1. After that, the cylinder 1 was rotated at 70 rpm for 20 seconds. The powder is evenly distributed in the axial direction of the cylinder 1. Acceleration of the cylinder: The cylinder 1 is accelerated from a stationary state to a temperature shown in Table 1 to 3500 r pm (rotational speed of centrifugal force 3G). After the rotation speed, the rotation speed is kept constant. Heating of the cylinder: heating the cylinder 1 to 1 0 50 ° C. Thereby, the internal powder is also heated to approximately the same temperature, so that the powder is partially melted. Hold time 30 seconds. Cooling of the cylinder: continuous cooling. With the above operation, in each test tube The surface is formed with a fusion coating layer. The thickness deviation rate of the thickness of the parent layer and the axial direction is measured, and the presence or absence of pinholes is checked. The results are shown in the graphs of Tables 1 and 3 (please read the back first). Note on this page)

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This paper scale is applicable to China National Standard (CNS) A4 specification (210X 297 mm) 1254750 A7 B7 V. Invention description (16) 1 ] The test number uses the inner surface roughness (μ mRa) inner surface processing method until 3G Acceleration time coating thickness (mm) Thickness deviation rate (%) Pinhole test 1 A 20 Sandblasting 15 2 25 dfirri mt! J 1 Test 2 A 20 Sandblasting 2 2 New jnil Test 3 B 5 Sandblasting 15 2 35 4ττΐ. ΊΤΓΓ J INN Test 4 B 5 Sandblasting 2 2 te Sichuan N Test 5 C 0.5 Dawn 2 2 20 > frrr: irTT: (Please read the note on the back and fill out this page) Printed by the Ministry of Economic Affairs, Intellectual Property Bureau, Staff Cooperatives The paper scale applies to the Chinese National Standard (CNS) A4 specification (210X 297 mm) According to Table 1 and Figure 3, it can be clearly seen that the shorter the acceleration time, the smaller the thickness deviation rate becomes, and the inner surface roughness of the cylinder The larger the thickness, the smaller the thickness deviation rate becomes. Therefore, it has been confirmed that the inner surface roughness is increased, and the thickness deviation in the axial direction of the coating can be effectively prevented. (Experiment 2) As the test cylinders D, E, and F, the cylinder 1 of the following specifications was prepared. Test D: outer diameter 125mm x inner diameter 27mmx length 1250 mm material: SC Μ 4 1 0 inner surface: sandblasting, inner surface roughness 2 0 //mR a specimen E: outer diameter 1 2 5mmx inner diameter 3 5mmx length 1 2 5 0 mm Material: SC Μ 4 1 0 ---^43-=_ 1254750 Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printed A7 __ B7 V. Invention description (17) Inner surface · Sandblasting treatment, inner surface Thickness 5 //mR a Test F: Outer diameter 1 2 5mmx Inner diameter 4 4mmx Length 1 2 5 0 mm Material: SC Μ 4 1 0 Inner surface: Sandblasted, inner surface roughness 5 //mRa Each inner surface of the body barrel was coated with a self-fusing alloy under the following conditions using the apparatus shown in Fig. 1 and Fig. 2 . Self-fluxing alloy powder used: HEGANESU (~力,本只) # 1 3 5 5 - 2 0 Solidus temperature: 9 7 〇 °C Liquidus temperature: 1 0 7 〇 °C Loading powder·· A powder of the amount shown in Table 2 was placed at one of the cylinders 1. Thereafter, the cylinder 1 was rotated at 70 rpm for 20 seconds. Thereby, the powder is uniformly distributed in the axial direction inside the cylinder 1. Acceleration of the cylinder: The cylinder 1 was accelerated from the stationary state at the time shown in Table 2 to the rotational speed shown in Table 2 (the rotational speed at which the centrifugal force 3 G acts). After the rotation speed is reached, the rotation speed is maintained. Heating of the barrel: The barrel 1 is heated to 1 0 2 0 ° C. The inner powder is also heated to approximately the same temperature to cause the powder to be in a localized molten state. Hold time 60 seconds. 13⁄4 body cooling: draw cooling. By the above operation, a soluble coating layer was formed on the inner surface of each of the test cartridges. The thickness deviation rate of the thickness of the parent layer and the direction of the axis was measured and checked for pinholes. The results are shown in the charts in Table 2 and Figure 4. ___ ?n -_____ This paper size applies to the Chinese National Standard (CNS) A4 specification (210X 297 mm) (please read the notes on the back and fill out this page)

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1254750 V. Description of invention (18) Show 0 Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printed A7 B7 [Table 2] Test number using the same body inner diameter (mm) Powder supply amount (Kg) to 3G acceleration time rotation Speed (rpm) Cover Thickness (mm) ---, Thickness Deviation (%) ----- With or without pinhole test 6 D 27 1.5 20 450 2 15 No test 7 D 27 1.5 15 450 2 No test 8 E 35 2.0 15 390 2 25 No test 9 E 35 2.0 10 390 2 20 •Μ Test 10 E 35 2.0 5 390 2 Μ No test 11 F 44 2.5 10 350 2 25 te Test 1 2 F 44 2.5 5 350 2 15 No test 13 F 44 2.5 2 350 2 New Zealand N girl j \\\ According to Table 2 and Figure 3, it can be clearly seen that 'the shorter the acceleration time, the smaller the thickness deviation rate, and the larger the inner diameter', the thickness deviation rate As the size becomes larger, it is clear that the acceleration time needs to be shortened if the thickness deviation rate is suppressed to be small. Further, in the graph of Fig. 3, the region where the thickness deviation is hardly generated is plotted by the curve 15, and the following experimental formula (A) 〇τ = K / D 3 is obtained from the curve 15. (A) 〔 D is the inner diameter of the cylinder (mm), K=3x 105 (s · mm3) ____- This paper scale applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the notes on the back and fill in the form) page}

1254750 A7 B7 Ministry of Economic Affairs, Smart Finance, 4th Bureau, Employees, Consumer Cooperatives, Printing 5, Inventions (19) Therefore, when self-fluxing alloy coating is applied to a cylinder with an inner surface roughness of 5 //mR a or more, the powder is placed in the cylinder. After being evenly distributed in the axial direction, the cylinder is rotated to a rotational speed at which a centrifugal force of 3 G or more is generated, and the thickness can be formed in the axial direction of the cylinder when the time r値 obtained by the above experimental formula (A) is not exceeded. Almost unbiased coverage. (Experiment 3) As the test cylinder G, two cylinders 1 of the following specifications were prepared. Test piece G: outer diameter 1 2 5mmx inner diameter 44mmx length 1 2 5 0 mm material: SCM410 inner surface: sand blasting, inner surface roughness 2 0 //mRa on the inner surface of the test cylinder G, using the first The apparatus shown in Fig. 2 and Fig. 2 were coated with a self-fusing alloy under the following conditions. Self-fluxing alloy powder used: HEGANESU ('力, 氺又) # 1 3 5 5 — 2 0 Solidus temperature: 9 7 0 °C Liquidus temperature: 1 0 7 0 °C Powder: One portion of the cylinder 1 was charged with 2.5 kg of powder. Thereafter, the cylinder 1 was rotated at 70 rpm for 20 seconds. Thereby, the powder is uniformly distributed in the axial direction inside the cylinder 1. Acceleration of the cylinder: The cylinder 1 is accelerated from a stationary state to 3 5 0 r pm in 2 seconds (rotational speed of the centrifugal force 3 G). After the rotation speed is reached, the rotation speed is maintained. (Please read the notes on the back and fill out this page)

This paper scale applies to China National Standard (CNS) Α4 specification (210Χ 297 mm) 1254750 A7 B7 Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printing 5, invention description (2〇) Heating of the cylinder: 2 test cylinders The heating temperature of the following (a) ' (b) is set separately. (a) Heat the barrel 1 to 1 〇 70 t:. Thereby, the internal powder is also heated to substantially the same temperature to cause the powder to be partially melted. Keep the time for 20 seconds. (b) The barrel 1 is heated to 1 1 60 °C. Thereby, the internal powder is also heated to substantially the same temperature to cause the powder to be partially melted. Keep the time for 20 seconds. Cooling of the cylinder: continuous cooling. By the above operation, a fusion coating layer is formed on the inner surface of each of the test cartridges. Regarding the thickness deviation rate of the parent layer and the thickness deviation in the axial direction and the presence or absence of pinholes, there was no thickness deviation or pinhole. Further, the results of measurement of the hardness of the coating were as follows. (a) When the heating temperature of the cylinder is l〇70t: when the degree of Hr700 is (b) When the heating temperature of the cylinder is 1 1 60 °C, the degree of Hr 4 50 is clearly known according to the result, and the powder is not completely melted. Maintaining a partially melted state, an extremely hard coating layer can be obtained. [Effect of the Invention] As described above, in the present invention, when the inner surface of the cylinder is coated with a self-fluxing alloy, the self-fluxing alloy powder corresponding to the thickness of the coating is placed in the cylinder and uniformly arranged on the axis. After the direction, turn the cylinder in a short time ----23^_ (please read the notes on the back and fill out this page)

Set 4. This paper scale applies to China National Standard (CNS) A4 specification (210X297 mm) Ministry of Economic Affairs Zhici Property Bureau Staff Consumer Cooperative Printed 1254750 A7 B7 V. Invention Description (21) Dynamically achieves a centrifugal force of 3 G or more The composition of the rotational speed enables the auto-dissolved alloy powder to adhere to the inner surface of the cylinder in a direction of no deviation of the cylinder in the axial direction and the circumferential direction of the cylinder, and further heats and melts the internal powder by a composition which heats the entire length of the cylinder afterwards. The inner surface of the cylinder is coated with a self-fluxing alloy, and the self-fluxing alloy coating of the primary method is applied to have good productivity, and the effect of coating the self-fluxing alloy in which the thickness of the cylinder axis is almost non-deviation is formed. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic perspective view of a self-fusing alloy coating device for a metal cylinder used in the practice of the method of the present invention. The second (a), (b) and (c) are schematic cross-sectional views showing the sequence in which the resin coating is formed on the inner surface of the cylinder according to the apparatus of Fig. 1. Fig. 3 is a graph showing the relationship between the thickness deviation rate in the axial direction and the surface roughness and the acceleration time of the inner surface of the cylinder obtained in Experiment 1. Fig. 4 is a graph showing the relationship between the thickness deviation rate of the coating in the axial direction and the inner diameter of the cylinder and the acceleration time obtained in Experiment 2. Fig. 5 is a schematic cross-sectional view showing the position of the circumferential direction of the cylindrical body 1 in rotation. Fig. 6 is a schematic cross-sectional view showing the embodiment of the self-fusing alloy device in the case where the heating device employs a multi-turn coil inductor. [Symbol Description] _-^24-- This paper size applies to Chinese National Standard (CNS) A4 specification (210'〆 297 mm) (please read the notes on the back and fill out this page)

1254750 A7 B7 V. INSTRUCTIONS (22) Printed by the Ministry of Economic Affairs, Intellectual Property Office, Staff Consumer Cooperative 1. 1. Same body 2. Auto-dissolved alloy powder 3 · · · . Cylinder support rotating device 4 .... Support roller 5 ...pressurizing roller 7 .... powder supply device 8 · · · . powder supply tube 9 · · · . feeding cart 10 · · internal combustion engine 11 - . heating device (please read the back note first) Fill in this page again)

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This paper scale applies to the Chinese National Standard (CNS) A4 specification (210X 297 mm)

Claims (1)

8 oo 8 8 ABCD 1254750 Announcement VI. Patent Application No. 9 1 1 0 3 8 2 6 Patent Application Revision of Chinese Patent Application (please read the first note on the back of the page) Amendment 25 of the month 1 · A self-fluxing alloy coating method for the inner surface of a metal cylinder, which is a fusion coating method of applying a self-fluxing alloy to the inner surface of a metal cylinder, which is characterized by the following operations: The self-fluxing alloy powder corresponding to the thickness of the coating is uniformly disposed in the axial direction of the cylinder in the inner surface of the cylinder placed laterally; (2) the cylinder is rotated about the axis thereof to generate 3 G or more The rotation speed of the centrifugal force is such that the powder in the cylinder body is in close contact with the inner surface of the cylinder in the circumferential direction of the cylinder. At this time, the time for generating the rotational speed of the centrifugal force of 3 G or more is achieved, so that the cylinder axis can be uniformly arranged. a direction in which the direction of the powder moves in the axial direction of the cylinder, thereby forming a powder layer having almost no deviation thickness in the axial direction and the circumferential direction of the cylinder and adhering to the inner surface of the cylinder; Printed by the staff consumption cooperatives of the bureau (3) to continuously rotate the cylinder, heat the cylinder at the same time as the whole cylinder is heated, so that the powder in the cylinder is simultaneously melted and kept in a molten state; (4) to continuously rotate the cylinder The body enters the cooling stage to solidify the self-melting alloy melted in the cylinder; the self-fluxing alloy is once melted in the entire inner surface of the cylinder, so that the self-fluxing alloy coating is formed in the axial direction and the circumferential direction of the cylinder with almost no deviation, and the above is performed ( 2) In the operation, the cylinder is made to produce 3 G. The paper size is applicable to China National Standard (CNS) A4 specification (2) 0X29 secret) _ 1 _ 1254750 A8 B8 C8 D8 Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative Printing 6. The rotation time 値' of the rotational speed of the centrifugal force above the patent application range is not more than the time obtained by the following experimental formula (A) r値r = K / D 3 . · · ( A ) [D system is The inner diameter (mm) of the cylinder, K = 3xl05 (s*mm3)]. 2. A self-fluxing alloy coating method for a metal cylinder inner surface, which is a fusion coating method of applying a self-fluxing alloy to a metal cylinder inner surface, characterized by: operating in the following order: (1) in a lateral direction The inner surface of the cylinder is placed, and the self-fluxing alloy powder corresponding to the thickness of the coating is uniformly disposed in the axial direction of the cylinder; (2) the cylinder is rotated about the axis thereof to achieve the rotation of the centrifugal force of 3 G or more. At the speed, the powder in the cylinder is adhered to the inner surface of the cylinder so as to be distributed in the circumferential direction of the cylinder. At this time, the time for generating the rotational speed of the centrifugal force of 3 G or more is achieved, and the powder which is uniformly disposed in the axial direction of the cylinder can be suppressed. a short period of movement of the cylinder axis direction, whereby a powder layer having almost no deviation thickness is formed in the cylinder axial direction and the circumferential direction to be in close contact with the inner surface of the cylinder; (3) the cylinder is continuously rotated in a state of continuously rotating the cylinder At the same time, the cylinder is heated to heat the powder in the cylinder at the same time and maintain the molten state; (4) the self-fluxing alloy which melts the cylinder in the cooling stage by continuously rotating the cylinder Coagulation is carried out; the self-fluxing alloy is once melted in the entire inner surface of the cylinder, so that the self-fluxing alloy coating is formed in the axial direction and the circumferential direction of the cylinder with almost no deviation, and the operation of the above (1) is performed, and the inner surface of the cylinder is first Surface (please read first, follow the precautions on the back page) This paper scale is reversed by China National Standard (CNS) to the specification (UOX297 mm) -2 - ABCD 1254750 6. The patented range is processed into 5~2 0//mRa, (Read the first reading · #背的注意的In the above operation (2), the cylinder is brought to a rotation time 产生 which produces a rotational speed of 3 G or more, which is not more than the time obtained by the following experimental formula (A).値r=K/D3· · · (A) [D is the inner diameter (mm) of the cylinder, Κ = 3 χ 1 05 (s · mm3)]. 3. The self-fluxing alloy coating method of the inner surface of the metal cylinder according to claim 1 or 2, wherein in the operation of the above (1), the self-fluxing alloy powder is uniformly disposed in the axial direction of the cylinder; The inside of the cylinder is filled with powder, and the cylinder is rotated about the axis thereof so that the powder in the cylinder does not spread over the circumferential direction of the cylinder, thereby allowing the powder in the cylinder to extend in the axial direction of the cylinder. 4. The method of coating the self-fluxing alloy in the inner surface of the metal cylinder of claim 1 or 2, wherein the heating of the cylinder is performed in the operation of (3) above. Heating the temperature of the self-fluxing alloy melted in the cylinder not exceeding the melting-related liquidus of the self-fluxing alloy, and the time for maintaining the molten state is selected to be 20 to 180 seconds, thereby forming no harmful Bubbles or self-fluxing alloys with no hardness. 5. The method of coating a self-fusing alloy in the inner surface of a metal cylinder according to claim 1 or 2, wherein the operation of the above (3) is carried out in a state in which the cylinder is depressurized or an oxidizing atmosphere. • a self-fluxing alloy coating device in the inner surface of a metal cylinder, characterized in that: the composition is provided with: a cylinder supporting rotating device that horizontally supports and rotates the metal cylinder; and the cylinder supporting device The supported cylinder is applicable to the Chinese National Standard (CMS) A4 specification (2丨0X297 mm) -3 - ABCD Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printing 1254750 VI. The supply within the scope of patent application is equivalent to the formation of the coating. a powder supply device for a self-fluxing alloy powder having a thickness; a heating device for performing a heat of the mouth of the cylinder supported by the cylindrical body supporting the rotating device, wherein the cylindrical body supports the rotating device, and the rotation speed of the cylindrical body is The rotational speed at which the centrifugal force of 3 G or more is generated in a short time not exceeding the time r obtained by the following experimental formula (A) is r=K/D3# · · (A) [D is the inner diameter of the cylinder ( Mm), K = 3xl 〇 5 (s· mm3)]. The self-fluxing alloy coating device of the inner surface of the metal cylinder according to the sixth aspect of the invention, wherein the heating device is provided with simultaneous induction heating between the cells in the circumferential direction of the cylinder supported by the cylinder supporting device. A sensor that extends over the entire length of the barrel. The self-fluxing alloy coating device of the inner surface of the metal cylinder according to the sixth aspect of the invention, wherein the heating device is configured to allow the cylinder supported by the cylinder supporting device to extend over the entire length of the package. An inductor in the form of a multi-turn coil that simultaneously heats the entire cylinder. This paper scale applies to China National Standard (CNS) A4 (2) 297 297 mm) (Read the first note on the back and fill out this page)