Method and device for repairing out-of-tolerance part of casting

Abstract

The invention provides a method and a device for repairing an out-of-tolerance part of a casting, and relates to the technical field of casting finish machining. Comprising the steps that an out-of-tolerance part on a casting is positioned, and the to-be-repaired position is determined; adjusting the proportion of oxygen and acetylene mixed gas of the cutting gun; the position to be repaired is cooled to 15-55 DEG C or 55-60 DEG C through purified water; and the tolerance of the repaired out-of-tolerance part is detected, and when the tolerance is determined to be qualified, the casting with the repaired out-of-tolerance part is obtained. The method is applied to repair of an out-of-tolerance part on a casting through a quenching and quenching technology, solves the problem of large tolerance of a fine hole and a fine groove through a physical principle of thermal expansion and cold contraction, and has the advantages of simple process, easiness in implementation, low cost and the like.

Description

Technical Field

[0001] The invention relates to the technical field of casting finishing, and in particular to a method and a device for repairing an out-of-tolerance part of a casting. Background Art

[0002] Through mold finishing and casting finishing, molds with complex shapes and high precision can be manufactured to produce high-quality castings, which can not only improve production efficiency, but also achieve large-scale and batch production to meet the needs of different industries. For example, it is widely used in the automotive, aerospace, machinery manufacturing and other industries.

[0003] In the casting manufacturing process, the deviation between the actual size and the designed size is an inevitable part, which is caused by many factors, such as mold wear, material shrinkage, etc. Although the tolerance is difficult to avoid to a certain extent, it has an important impact on the performance, assembly and use of castings. Therefore, controlling the tolerance of castings is an important link to ensure the quality and performance of castings. Through reasonable mold design, material selection, process control and other means, the tolerance can be effectively controlled, the accuracy and consistency of castings can be improved, and the castings can be ensured to meet the requirements of design and use.

[0004] In the processing practice of casting parts, the tolerance of the workpiece's finishing position is too large due to improper processing. When the out-of-tolerance part is reprocessed by welding or adding inserts, the process accuracy is high and the success rate is not high, which easily causes the workpiece to be scrapped, resulting in huge losses. In view of the above problems, the present invention proposes a method and device for repairing the out-of-tolerance part of the casting to at least partially solve the problems that may exist in the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a method and device for repairing out-of-tolerance parts of castings, which can propose solutions to the deficiencies of the prior art and solve the problem of large tolerances of fine holes and fine grooves through the physical principle of thermal expansion and contraction. It has the advantages of simple process, easy implementation and low cost.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A method for repairing an out-of-tolerance part of a casting, comprising:

[0008] Locate the out-of-tolerance parts on the casting and determine the position to be repaired;

[0009] Adjusting the ratio of oxygen and acetylene mixed gas in the cutting gun, wherein the ratio of oxygen to acetylene is 1:1-1.1 or 1:1.2-1.5;

[0010] The position to be repaired is heated by the cutting torch until the position to be repaired becomes red hot;

[0011] Cooling the location to be repaired to 15-55°C or 55-60°C by using pure water;

[0012] The tolerance of the repaired out-of-tolerance part is tested, and when the tolerance is determined to be qualified, a casting with the repaired out-of-tolerance part is obtained.

[0013] Furthermore, in the present invention, the positioning of the out-of-tolerance part on the casting to determine the position to be repaired includes:

[0014] A preset protective piece is covered on the casting so that the out-of-tolerance part is located in the positioning hole of the protective piece.

[0015] Further, in the present invention, the adjusting the ratio of oxygen and acetylene mixed gas of the cutting torch comprises:

[0016] Ignite a cutting torch filled with a mixed gas of oxygen and acetylene, and preliminarily judge the ratio of the oxygen and acetylene by the color of the flame;

[0017] The ratio of the oxygen to the acetylene is adjusted to 1:1-1.1 or 1:1.2-1.5, and the color of the flame is bright blue.

[0018] Furthermore, in the present invention, the temperature of the location to be repaired is lowered to 15-55° C. or 55-60° C. by using pure water, including:

[0019] The location to be repaired is cooled by spraying high-purity water and its surface temperature is monitored until the temperature drops below 55°C.

[0020] Furthermore, in the present invention, the tolerance of the repaired out-of-tolerance part is detected, and when the tolerance is determined to be qualified, a casting with the repaired out-of-tolerance part is obtained, comprising:

[0021] The tolerance of the out-of-tolerance part of the casting is tested by using adapter accessories or testing gauges. When the tolerance is determined to be qualified, the casting with the out-of-tolerance part repaired is obtained.

[0022] Furthermore, the present invention also includes:

[0023] Use a vernier caliper, micrometer or dial indicator to detect the out-of-tolerance parts of the casting and obtain the dimensional value;

[0024] The dimension value is compared with the preset standard dimension. If the comparison result meets the tolerance range, it is determined to be qualified and the casting with the out-of-tolerance part repaired is obtained.

[0025] Furthermore, in the present invention, the tolerance of the repaired out-of-tolerance part is tested, and when the tolerance is determined to be qualified, a casting with the repaired out-of-tolerance part is obtained, which also includes:

[0026] When the tolerance is determined to be unqualified, repeating the step of aiming the cutting gun at the position to be repaired to heat the position until the position to be repaired becomes red hot.

[0027] and,

[0028] The step of cooling the position to be repaired to 15-55° C. or 55-60° C. by using pure water until the tolerance is determined to be qualified, thereby obtaining a casting with the out-of-tolerance position repaired.

[0029] Furthermore, the method of locating the out-of-tolerance part on the casting and determining the position to be repaired in the present invention also includes:

[0030] Cleaning the out-of-tolerance parts on the castings by using isopropyl alcohol;

[0031] A preset protective piece is covered on the casting so that the out-of-tolerance part after cleaning is located in the positioning hole of the protective piece.

[0032] A device for repairing an out-of-tolerance part of a casting, comprising:

[0033] A positioning protection plate is provided with positioning holes for locating the out-of-tolerance part on the casting and determining the position to be repaired;

[0034] A cutting gun, comprising an ignition mechanism and a gas supply mechanism, for igniting a cutting gun filled with a mixed gas of oxygen and acetylene, and adjusting the ratio of the oxygen to the acetylene to be 1:1-1.1 or 1:1.2-1.5;

[0035] The cutting gun is also used to heat the position to be repaired until the position to be repaired becomes red hot;

[0036] A water cooling mechanism, comprising a temperature sensor, for cooling the location to be repaired to 15-55°C or 55-60°C by pure water;

[0037] The detection mechanism is used to detect the tolerance of the repaired out-of-tolerance part, and when the tolerance is determined to be qualified, the casting with the repaired out-of-tolerance part is obtained.

[0038] Furthermore, in the present invention, the water cooling mechanism is a water cooling spray device with an adjustable nozzle.

[0039] The present invention has at least the following advantages or beneficial effects:

[0040] The out-of-tolerance part on the casting is located to determine the position to be repaired; the ratio of oxygen and acetylene mixed gas in the cutting gun is adjusted; the position to be repaired is cooled to 15-55°C or 55-60°C by pure water; the tolerance of the repaired out-of-tolerance part is tested, and when the tolerance is determined to be qualified, the casting with the repaired out-of-tolerance part is obtained. Through quenching and rapid cooling technology, it is applied to the repair of out-of-tolerance parts on castings, and the problem of large tolerance of fine holes and fine grooves is solved through the physical principle of thermal expansion and contraction. It has the advantages of simple process, easy implementation and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 A flowchart of the steps of a method for repairing an out-of-tolerance portion of a casting provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example 1

[0045] Please refer to Figure 1 , showing a flowchart of the steps of a method for repairing an out-of-tolerance portion of a casting provided by this embodiment, which comprises:

[0046] Step S101, locating the out-of-tolerance part on the casting and determining the position to be repaired; by locating the out-of-tolerance part on the casting, only the position to be repaired is heated during quenching heating, thereby improving the heating efficiency;

[0047] Step S102, adjusting the ratio of the oxygen and acetylene mixed gas of the cutting gun, wherein the gas supply ratio of the oxygen and the acetylene can be adjusted to make the ratio between the two 1:1-1.1 or 1:1.2-1.5; by adjusting the ratio of the oxygen and the acetylene, the temperature of the cutting gun will not be too high to cause partial melting of the workpiece during the quenching process, resulting in the scrapping of the workpiece, thereby ensuring the repair of the out-of-tolerance parts;

[0048] Step S103, heating the position to be repaired by the cutting gun until the position to be repaired becomes red hot;

[0049] It should be noted that the red hot state is an intermediate state of the metal casting during the heating process. The temperature gradually rises, causing the metal surface to emit red light. In the red hot state, the metal is close to its melting point, but has not yet completely melted. Once the metal reaches the melting point, it will turn into a liquid state. The red hot state is the critical point when the metal is heated to a high enough temperature, with high thermal energy and luminous properties.

[0050] Step S104, cooling the position to be repaired to 15-55° C. or 55-60° C. by using pure water; by using pure water to cool the position to be repaired of the out-of-tolerance part, since pure water contains almost no impurities, no impurities will be attached to the casting during the rapid cooling process of the casting at a high temperature close to the melting state;

[0051] Step S105, testing the tolerance of the repaired out-of-tolerance part, and when the tolerance is determined to be qualified, obtaining a casting with the repaired out-of-tolerance part.

[0052] It should be noted that the current rapid cooling technology is generally used in two aspects. One is to improve the mechanical hardness of the surface, such as tempered glass. Ordinary glass is tempered by immersing it directly in water in a red-hot state. The other is used for interference fit of workpieces. For example, when installing the cylinder and piston of a car, the piston is first placed in an ultra-low temperature environment, such as liquid nitrogen, and then placed in the cylinder while the upper piston is still in a low-temperature state. The present application uses the rapid cooling technology to repair the out-of-tolerance parts of the casting. Through the physical principle of thermal expansion and contraction, the problem of large tolerances of fine holes and fine grooves is solved. This is a new application.

[0053] Example 2

[0054] This embodiment provides a method for repairing an out-of-tolerance portion of a casting, wherein the repair method comprises:

[0055] In the above step S101, "locating the out-of-tolerance part on the casting and determining the position to be repaired" is performed by covering the casting with a preset protective part so that the out-of-tolerance part is in the positioning hole of the protective part. By determining the out-of-tolerance part on the casting for positioning, only the position to be repaired is heated during quenching heating, and other parts are protected by the above protective part, thereby improving the heating efficiency.

[0056] As an example, the above step S101, locates the out-of-tolerance part on the casting and determines the position to be repaired; also includes: cleaning the surface of the out-of-tolerance part on the casting with isopropyl alcohol; the oil stains on the surface of the casting can be effectively removed to ensure the cleanliness of the position to be repaired, and avoid uneven heating due to dirt on it or dirt easily sticking to the casting, resulting in the repair position being unable to be repaired. By covering the casting with a preset protective part, the out-of-tolerance part is placed in the positioning hole of the protective part, and the out-of-tolerance part on the casting is determined and positioned, and when quenching and heating are performed, only the position to be repaired is heated, and other parts are protected by the above protective part, which can improve the heating efficiency.

[0057] In the above step S102, "adjusting the ratio of oxygen and acetylene mixed gas in the cutting gun", the cutting gun filled with oxygen and acetylene mixed gas is ignited, and the ratio of oxygen to acetylene is adjusted to 1:1-1.1 or 1:1.2-1.5; by adjusting the ratio of oxygen to acetylene, the temperature of the cutting gun will not be too high, resulting in partial melting of the workpiece during the quenching process, resulting in its scrapping, and the repair of the out-of-tolerance parts is ensured; in the present application, the preferred ratio is 1:1, so that the quenching heating temperature is about 1200°C-1300°C;

[0058] It should be noted that by directly quenching the out-of-tolerance parts on the casting, it can be heated up quickly. Due to the above-mentioned adjustment of the gas supply ratio, the temperature is maintained at about 1200°C to 1300°C. Since the castings are generally steel or stainless steel, their melting points are greater than 1300°C, and the heating temperature prevents the castings from melting. In addition, for other metal castings, the gas volume can be adjusted according to the melting points of different metals to ensure rapid quenching without melting them.

[0059] As an example, the adjusting the ratio of the oxygen and acetylene mixed gas of the cutting gun includes: igniting the cutting gun filled with the oxygen and acetylene mixed gas, and preliminarily judging the ratio of the oxygen and the acetylene by the color of the flame; adjusting the ratio of the oxygen and the acetylene to 1:1-1.1 or 1:1.2-1.5, and making the color of the flame bright blue;

[0060] It should be noted that the color of the gas cutting flame will change when the ratio of oxygen to acetylene is different. Generally speaking, the higher the ratio of oxygen to acetylene, the brighter the color of the flame will be. During the gas cutting process, the color of the flame mainly depends on the production of excited and ionized atoms and molecules in the combustion products. When the ratio of oxygen to acetylene increases, the combustion reaction is more complete, and more excited and ionized atoms are produced, making the flame color brighter. When the ratio of oxygen to acetylene is 1:1, the color of the flame is usually bright blue, because at this time the reaction of oxygen and acetylene is most complete, and abundant excited and ionized atoms are produced. However, when oxygen is in excess relative to acetylene, the color of the flame may change. When the oxygen supply increases, the color of the flame will gradually change from blue to white, and eventually to yellow. That is, an increase in the oxygen supply will increase the flame temperature.

[0061] In the above step S103, "heating the position to be repaired by the cutting torch until the position to be repaired becomes a red-hot state" makes it in a red-hot state, which is close to its melting point but not completely melted.

[0062] In the above step S104, "the position to be repaired is cooled to 15-55°C or 55-60°C by pure water". The position to be repaired is cooled by cold spraying with high-purity water and its surface temperature is monitored until the temperature drops below 55°C; in this application, it is preferably 25-40°C, which is close to room temperature.

[0063] It should be noted that high purity water refers to water with a conductivity of less than 0.1μs / cm and a residual salt content of less than 0.3mg / L at 25°C, and water from which non-dielectric impurities such as trace bacteria, microorganisms, and particles have been removed. Preparation methods include distillation, membrane separation, ion exchange, and sterilization.

[0064] The above-mentioned step S105 "detecting the tolerance of the repaired out-of-tolerance part, and when the tolerance is determined to be qualified, obtaining the casting with the out-of-tolerance part repaired" includes: detecting the tolerance of the out-of-tolerance part of the casting through adapter accessories or detection measuring tools, and when the tolerance is determined to be qualified, obtaining the casting with the out-of-tolerance part repaired.

[0065] As an example, the tolerance of the out-of-tolerance part of the casting is detected by using adapter accessories or testing tools. When the tolerance is determined to be qualified, the casting with the out-of-tolerance part repaired is obtained. Specifically, the out-of-tolerance part of the casting is detected by using a vernier caliper, a micrometer or a dial indicator to obtain a dimensional value; the dimensional value is compared with a preset standard dimension. If the comparison result meets the tolerance range, it is determined to be qualified, and the casting with the out-of-tolerance part repaired is obtained.

[0066] The above-mentioned step S105 "detecting the tolerance of the repaired out-of-tolerance part, and when the tolerance is determined to be qualified, obtaining the casting with the out-of-tolerance part repaired" also includes, when the tolerance is determined to be unqualified, repeating step S103 to aim the cutting gun at the position to be repaired for heating until the position to be repaired becomes a red-hot state, and step S104 to cool the position to be repaired to 15-55°C or 55-60°C by pure water; until the tolerance is determined to be qualified, the casting with the out-of-tolerance part repaired is obtained.

[0067] In a specific example, for example, in a groove of a workpiece, the tolerance is +0.10 to +0.15 μm, which is 0.10 μm larger than the required tolerance; the out-of-tolerance parts on the casting are first cleaned with isopropyl alcohol reagent to remove surface oil stains, and then air-dried or naturally dried. Since isopropyl alcohol has good volatility and is more environmentally friendly, it ensures that the out-of-tolerance parts of the casting are clean; by covering the workpiece with a positioning protective plate, the out-of-tolerance parts on the casting are positioned, and the cutting torch filled with oxygen-acetylene mixed gas is ignited. The ratio of oxygen and acetylene is adjusted to 1:1 by observing the flame color, and the flame color is bright blue. The temperature of the cutting torch flame is preferably lower than the melting point of the workpiece material, and the out-of-tolerance parts are aligned. The poor part of the workpiece is grilled. When the quenched surface of the workpiece turns red, high-purity water is quickly poured on the surface of the workpiece after quenching until the temperature drops to 40°C. By cooling to a lower temperature, it can be prevented that the casting will still warm up due to the high internal temperature of the workpiece after the surface is cooled due to the excessive internal residual temperature, which will increase the temperature and be unfavorable for subsequent inspections. Use real accessories or inspection measuring tools, such as vernier calipers, to measure the out-of-tolerance parts of the workpiece after quenching and cooling. If the tolerance is too large, it can be repeatedly grilled and cooled until the tolerance of the out-of-tolerance part is qualified. For example, the tolerance of the above workpiece is within 0.05μm by quenching and heating and then water cooling repair. The tolerance of the repaired workpiece meets the requirements. Through the above embodiments, the rapid cooling technology is applied to repair workpieces with large tolerance deviations, which is low in cost and high in efficiency.

[0068] Example 3

[0069] A device for repairing an out-of-tolerance part of a casting, comprising:

[0070] A positioning protection plate is provided with positioning holes for locating the out-of-tolerance part on the casting and determining the position to be repaired;

[0071] A cutting gun, comprising an ignition mechanism and a gas supply mechanism, for igniting a cutting gun filled with a mixed gas of oxygen and acetylene, and adjusting the ratio of the oxygen to the acetylene to be 1:1-1.1 or 1:1.2-1.5;

[0072] The cutting gun is also used to heat the position to be repaired until the position to be repaired becomes red hot;

[0073] A water cooling mechanism, comprising a temperature sensor, for cooling the location to be repaired to 15-55°C or 55-60°C by pure water;

[0074] The detection mechanism is used to detect the tolerance of the repaired out-of-tolerance part, and when the tolerance is determined to be qualified, the casting with the repaired out-of-tolerance part is obtained.

[0075] As a preferred implementation, the water cooling mechanism is a water cooling spray device with an adjustable nozzle.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0077] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0078] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0079] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0080] The above is a detailed introduction to a method and device for repairing an out-of-tolerance part of a casting provided by the present invention. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for a person skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for repairing an out-of-tolerance part of a casting, characterized in that: include: Locate the out-of-tolerance parts on the casting and determine the position to be repaired; Adjusting the ratio of oxygen and acetylene mixed gas in the cutting gun, wherein the ratio of oxygen to acetylene is 1:1-1.1 or 1:1.2-1.5; The position to be repaired is heated by the cutting torch until the position to be repaired becomes red hot; Cooling the location to be repaired to 15-55°C or 55-60°C by using pure water; The tolerance of the repaired out-of-tolerance part is tested, and when the tolerance is determined to be qualified, a casting with the repaired out-of-tolerance part is obtained.

2. The method for repairing an out-of-tolerance portion of a casting according to claim 1, characterized in that: The method of locating the out-of-tolerance part on the casting and determining the position to be repaired comprises: A preset protective piece is covered on the casting so that the out-of-tolerance part is located in the positioning hole of the protective piece.

3. The method for repairing an out-of-tolerance portion of a casting according to claim 1, characterized in that: The method of adjusting the ratio of oxygen and acetylene mixed gas of the cutting torch comprises: Ignite a cutting torch filled with a mixed gas of oxygen and acetylene, and preliminarily judge the ratio of the oxygen and acetylene by the color of the flame; The ratio of the oxygen to the acetylene is adjusted to 1:1-1.1 or 1:1.2-1.5, and the color of the flame is bright blue.

4. The method for repairing an out-of-tolerance portion of a casting according to claim 1, characterized in that: The method of cooling the location to be repaired to 15-55° C. or 55-60° C. by using pure water comprises: The location to be repaired is cooled by spraying high-purity water and its surface temperature is monitored until the temperature drops below 55°C.

5. The method for repairing an out-of-tolerance portion of a casting according to claim 1, characterized in that: The method of detecting the tolerance of the repaired out-of-tolerance part and obtaining the casting with the repaired out-of-tolerance part when the tolerance is determined to be qualified comprises: The tolerance of the out-of-tolerance part of the casting is tested by using adapter accessories or testing gauges. When the tolerance is determined to be qualified, the casting with the out-of-tolerance part repaired is obtained.

6. The method for repairing an out-of-tolerance portion of a casting according to claim 5, characterized in that: Also includes: Use a vernier caliper, micrometer or dial indicator to detect the out-of-tolerance parts of the casting and obtain the dimensional value; The dimension value is compared with the preset standard dimension. If the comparison result meets the tolerance range, it is determined to be qualified, and the casting with the out-of-tolerance part repaired is obtained.

7. The method for repairing an out-of-tolerance portion of a casting according to claim 1, characterized in that: The tolerance of the repaired out-of-tolerance part is detected, and when the tolerance is determined to be qualified, a casting with the repaired out-of-tolerance part is obtained, and the method further comprises: When the tolerance is determined to be unqualified, repeating the step of aiming the cutting gun at the position to be repaired to heat the position until the position to be repaired becomes red hot. and, The step of cooling the position to be repaired to 15-55° C. or 55-60° C. by using pure water until the tolerance is determined to be qualified, thereby obtaining a casting with the out-of-tolerance position repaired.

8. The method for repairing an out-of-tolerance portion of a casting according to claim 1, characterized in that: The method of locating the out-of-tolerance part on the casting and determining the position to be repaired also includes: Cleaning the out-of-tolerance parts on the castings by using isopropyl alcohol; A preset protective piece is covered on the casting so that the out-of-tolerance part after cleaning is located in the positioning hole of the protective piece.

9. A device for repairing out-of-tolerance parts of castings, characterized in that: include: A positioning protection plate is provided with positioning holes for locating the out-of-tolerance part on the casting and determining the position to be repaired; A cutting gun, comprising an ignition mechanism and a gas supply mechanism, for igniting a cutting gun filled with a mixed gas of oxygen and acetylene, and adjusting the ratio of the oxygen to the acetylene to be 1:1-1.1 or 1:1.2-1.5; The cutting gun is also used to heat the position to be repaired until the position to be repaired becomes red hot; A water cooling mechanism, comprising a temperature sensor, for cooling the location to be repaired to 15-55°C or 55-60°C by pure water; The detection mechanism is used to detect the tolerance of the repaired out-of-tolerance part, and when the tolerance is determined to be qualified, the casting with the repaired out-of-tolerance part is obtained.

10. The device for repairing out-of-tolerance parts of castings according to claim 9, characterized in that: The water cooling mechanism is a water cooling spray device with an adjustable nozzle.

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