A new method for controlling the amount of thermal distortion in the machining of a part

Abstract

The application provides a new method for controlling the amount of thermal deformation in part processing, and belongs to the technical field of part processing, and comprises the following steps: taking a part to be processed and placing it in a cleaning device; the application is internally provided with a preheating step for the part, and after preheating, the part is subjected to a nitriding and oxidizing treatment process, so that the structural strength of the treated part is improved, the internal stress of the part is relieved to a certain extent, the oxidation layer on the outer part can bind the part to a certain extent, the thermal deformation of the part is well controlled, and the method is further provided with a physical anti-deformation process, specifically, two smooth plates are used to press the upper and lower walls of the part to achieve physical pressure on the part, so that thermal deformation of the part is avoided, and through the combination of processing and physical control of the part, the control effect of the thermal deformation of the part is greatly improved, and the overall method has good practical application effect.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of part machining, and in particular to a novel method for controlling thermal deformation in part machining. BACKGROUND

[0002] Parts are basic elements of machines. A machine generally comprises one or more prime movers for accepting energy from the outside world, an execution part for realizing the production function of the machine, and a transmission part for transmitting the movement and power of the prime mover to the execution part. Parts play an important role in the machine, and different parts have different functions. When a part is subjected to thermal processing, the thermal deformation of the part needs to be controlled, and a part thermal deformation control method needs to be applied.

[0003] A metal workpiece thermal treatment deformation control method is disclosed in Chinese Patent (CN101550482A), which specifically adopts one of the following two methods: the first method is to use a spherical medium around the workpiece to block the movement of the cooling medium and reduce the deformation of the workpiece caused by the mechanical action of water; the second method is to fix the relative position of each part of the workpiece by mechanical means to limit the deformation of the workpiece. The device filled with spherical substances in the frame can limit the deformation of the light alloy workpiece. The conventional workpiece thermal treatment fixture can only be used for a specific workpiece. Another advantage of the workpiece thermal treatment method is that it can be suitable for workpieces of various shapes. The current thermal treatment deformation control method generally only uses a single processing method to control the thermal deformation of the metal workpiece. Although a certain control effect on thermal deformation can be achieved, the control effect cannot reach the ideal state, and the metal will still produce some micro thermal deformation. The actual application effect of the overall method is not good. In order to solve this problem, a novel method for controlling the thermal deformation of a part in machining is urgently needed.

[0004] INVENTION CONTENTS

[0005] Therefore, the application provides a novel method for controlling the thermal deformation of a part in machining, which can effectively control the thermal deformation of the metal.

[0006] In order to solve the technical problem that the current thermal treatment deformation control method generally only uses a single processing method to control the thermal deformation of the metal workpiece, although a certain control effect on thermal deformation can be achieved, the control effect cannot reach the ideal state, and the metal will still produce some micro thermal deformation, and the actual application effect of the overall method is not good, the application provides a novel method for controlling the thermal deformation of a part in machining, which comprises the following steps:

[0007] S1, take the parts to be processed, put it in the cleaning device, add acid solution to the device, improve the temperature of the cleaning solution, clean the parts;

[0008] S2, take out the parts to dry the liquid on the surface, put it in the air furnace, improve the temperature in the air furnace, preheat for a period of time;

[0009] S3, take out the preheated parts, spread a layer of salt on the surface of the parts, then put them in the heating furnace, improve the heating temperature to 550-600℃, and keep for 45-55min.

[0010] S4, take the parts, put them in the oxidation furnace, set the oxidation temperature, keep for a period of time, and make the parts undergo certain oxidation treatment;

[0011] S5, take the oil, put it in the cooling barrel, when the temperature of the parts reaches a certain degree, put the parts in the barrel for oil cooling;

[0012] S6, take out the parts, clean the outside of them;

[0013] S7, take two metal flat plates and a metal chain, and process the two metal flat plates;

[0014] S8, tightly attach the two metal flat plates to the upper and lower surfaces of the parts, and wrap the metal chain around the outside of the two metal flat plates;

[0015] S9, use a knocking hammer to gently knock the upper and lower surfaces of the two metal flat plates several times, and observe.

[0016] As a further description of the above technical solution:

[0017] In S1, take the parts to be processed, put them in the cleaning device, add acid solution to the device, improve the temperature of the cleaning solution to 70-80℃, clean the parts, and the acid solution is dilute hydrochloric acid solution.

[0018] As a further description of the above technical solution:

[0019] In S2, take out the parts to dry the liquid on the surface, put it in the air furnace, improve the temperature in the air furnace to 260-280℃, and preheat for 25-35min.

[0020] As a further description of the above technical solution:

[0021] In S3, take out the preheated parts, spread a layer of salt on the surface of the parts, then put them in the heating furnace, improve the heating temperature to 550-600℃, and keep for 45-55min.

[0022] As a further description of the above technical solution:

[0023] In the S4, the parts are placed in an oxidation furnace, the oxidation temperature is set to 380-400 DEG C, and the parts are kept for 1-2 hours for certain oxidation treatment.

[0024] As a further description of the above technical solution:

[0025] In the S5, the oil is placed in a cooling barrel, and the part temperature is cooled to 220-240 DEG C, and the part is placed in the barrel for oil cooling, and the oil is 180# solvent oil.

[0026] As a further description of the above technical solution:

[0027] In the S6, the parts are taken out and cleaned with a 30-40 DEG C degreasing agent.

[0028] As a further description of the above technical solution:

[0029] In the S7, two metal flat plates and a metal chain are taken, the two metal flat plates are polished and polished to ensure the flatness of the two metal flat plates.

[0030] As a further description of the above technical solution:

[0031] In the S8, the two metal flat plates are tightly attached to the upper and lower surfaces of the parts, and no gap is generated between the two metal flat plates, and the metal chain is wound outside the two metal flat plates, and the metal chain is locked.

[0032] As a further description of the above technical solution:

[0033] In the S9, a knocking hammer is used to gently knock the upper and lower surfaces of the two metal flat plates for 5-7 times, and whether the metal slag falls off is observed, if the metal slag falls off, it indicates that the treatment fails and needs to be reprocessed, if the metal slag does not fall off, it indicates that the treatment is successful.

[0034] Compared with the prior art, the present application has at least one of the following beneficial technical effects:

[0035] The method is internally provided with a preheating step for the part, and after preheating, the part is subjected to nitriding and oxidation treatment processes, the structural strength of the treated part is all improved, the internal stress of the part is relieved to a certain extent, and the oxidation layer on the outside of the part can produce a certain binding effect on the part, thereby effectively preventing the part from being deformed during subsequent processing, and the thermal deformation of the part is well controlled, and the method is internally provided with a physical anti-deformation process, specifically, two smooth plates are used to press the upper and lower walls of the part, thereby achieving physical pressure on the part, thereby avoiding thermal deformation of the part, and the combination of processing and physical control of the part can greatly improve the thermal deformation control effect of the part, and the overall method has good practical application effect. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The present application relates to a flowchart of a new method for controlling the amount of thermal deformation in part processing. DETAILED DESCRIPTION

[0037] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, specific embodiments of the present application will be described below with reference to the drawings of the embodiments of the present application. Figure 1 The technical scheme of the embodiments of the present application is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0038] Embodiment 1

[0039] Please refer to Figure 1 The present application provides a technical scheme: a new method for controlling the amount of thermal deformation in part processing, comprising the following steps:

[0040] S1, take the part to be processed, place it in a cleaning device, add acid solution to the device, increase the temperature of the cleaning solution to 70℃, clean the part, and the acid solution is dilute hydrochloric acid solution;

[0041] S2, take out the part and blow dry the surface liquid, place it in an air furnace, and increase the temperature in the air furnace to 260℃, and preheat for 25min;

[0042] S3, take out the preheated part, spread a layer of salt on the surface of the part, and then place it in a heating furnace, increase the heating temperature to 550℃, and maintain for 45min;

[0043] S4, take the part and place it in an oxidation furnace, set the oxidation temperature to 380℃, and maintain for 1h to allow the part to be subjected to certain oxidation treatment;

[0044] S5, take the oil liquid, place in the cooling barrel, when the part temperature reaches 220℃, put the part in the barrel for oil cooling, the oil liquid is 180# solvent oil;

[0045] S6, take out the part, use 30℃ degreasing agent to clean the outside of the part;

[0046] S7, take two metal flat plates and a metal chain, polish and grind the two metal flat plates to ensure the flatness of the two metal flat plates;

[0047] S8, tightly attach the two metal flat plates to the upper and lower surfaces of the part respectively, and there should be no gap between them, then wrap the metal chain outside the two metal flat plates, and lock the metal chain;

[0048] S9, use a knocking hammer to gently knock the upper and lower surfaces of the two metal flat plates for 5 times, and observe whether there is metal slag falling off, if falling off, it means that the treatment fails and needs to be reprocessed, if not, it means that the treatment is successful.

[0049] In this embodiment, the method is provided with a preheating step for the part, and after preheating, the part is subjected to nitriding and oxidation treatment process, the structural strength of the treated part is improved, the internal stress of the part is relieved to a certain extent, and the oxidation layer on the outside of the part can bind the part to a certain extent, thereby effectively preventing the part from being deformed during subsequent processing, and the thermal deformation of the part is well controlled.

[0050] Example 2

[0051] Please refer to Figure 1 The present application provides a technical solution: a new method for controlling the amount of thermal deformation in part processing, comprising the following steps:

[0052] S1, take the part to be processed, put it in the cleaning device, add acid solution to the device, increase the temperature of the cleaning liquid to 75℃, and clean the part, the acid solution is dilute hydrochloric acid solution;

[0053] S2, take out the part and dry the surface liquid, put it in the air furnace, increase the temperature in the air furnace to 270℃, and preheat for 30min;

[0054] S3, take out the preheated part, spread a layer of salt on the surface of the part, and then put it in the heating furnace, increase the heating temperature to 580℃, and keep for 50min;

[0055] S4, take the part, place it in the oxidation furnace, set the oxidation temperature to 390℃, and keep for 1h to make the part undergo certain oxidation treatment;

[0056] S5, take the oil liquid, place in the cooling barrel, and wait for the part temperature to reach 230 DEG C, and place the part in the barrel for oil cooling, and the oil liquid is 180# solvent oil;

[0057] S6, take out the part, and use 36 DEG C degreasing agent to clean the outside of the part;

[0058] S7, take two metal plane plates and a metal chain, polish and grind the two metal plane plates to ensure the flatness of the two metal plane plates;

[0059] S8, tightly attach the two metal plane plates to the upper and lower surfaces of the part respectively, and no gap is generated between the two metal plane plates, and the metal chain is wound outside the two metal plane plates and locked;

[0060] S9, use a knocking hammer to gently knock the upper and lower surfaces of the two metal plane plates for 6 times, and observe whether metal slag falls off, if the metal slag falls off, it indicates that the treatment fails and needs to be reprocessed, and if the metal slag does not fall off, it indicates that the treatment is successful.

[0061] In the embodiment, the method is also specially provided with a physical anti-deformation process, specifically, two smooth plates are used to press the upper and lower walls of the part, so that the physical pressure on the part is achieved, and the thermal deformation of the part is avoided, and by combining the processing of the part with physical control, the control effect of the thermal deformation of the part can be greatly improved, and the overall method has good practical application effect.

[0062] Embodiment 3

[0063] Please refer to Figure 1 The application provides a technical solution: a novel method for controlling the thermal deformation amount in part processing, comprising the following steps:

[0064] S1, take the part to be processed, place it in a cleaning device, add acid liquid to the device, increase the temperature of the cleaning liquid to 80 DEG C, and clean the part, and the acid liquid is a dilute hydrochloric acid solution;

[0065] S2, take out the part to dry the liquid on the surface, place it in an air furnace, and increase the temperature in the air furnace to 280 DEG C, and preheat for 35 min;

[0066] S3, take out the preheated part, spread a layer of salt on the surface of the part, and then place it in a heating furnace, increase the heating temperature to 600 DEG C, and maintain for 55 min;

[0067] S4, take the part, place it in an oxidation furnace, set the oxidation temperature to 400 DEG C, and maintain for 2 h, so that the part is subjected to certain oxidation treatment;

[0068] S5, take the oil liquid, place in the cooling barrel, when the part temperature reaches 240℃, put the part in the barrel for oil cooling, the oil liquid is 180# solvent oil;

[0069] S6, take out the part, use 40℃ degreasing agent to clean the outside of the part;

[0070] S7, take two metal flat plates and a metal chain, polish and grind the two metal flat plates to ensure the flatness of the two metal flat plates;

[0071] S8, tightly attach the two metal flat plates to the upper and lower surfaces of the part, respectively, without gap between them, and wrap the metal chain outside the two metal flat plates, and lock the metal chain;

[0072] S9, use a knocking hammer to gently knock the upper and lower surfaces of the two metal flat plates for 7 times, and observe whether there is metal slag falling off, if falling off, it indicates that the treatment fails and needs to be reprocessed, if not falling off, it represents that the treatment is successful.

[0073] In this embodiment, the method is provided with a preheating step for the part, and after preheating, the part is subjected to nitriding and oxidation treatment process, so that the structural strength of the treated part is improved, the internal stress is relieved to a certain extent, and the oxidation layer on the outside of the part can bind the part to a certain extent, thereby effectively preventing the part from being deformed during subsequent processing, and the thermal deformation of the part is well controlled. In addition, the method is specially provided with a physical anti-deformation process, which specifically uses two smooth plates to press the upper and lower walls of the part, so as to achieve the physical pressure effect on the part, thereby avoiding the thermal deformation of the part. By combining the processing and physical control of the part, the control effect of the thermal deformation of the part can be greatly improved, and the overall method has good practical application effect.

[0074] Example 4

[0075] Please refer to Figure 1 The present application provides a technical solution: a new method for controlling the amount of thermal deformation in part processing, comprising the following steps:

[0076] S1, take the part to be processed, put it in the cleaning device, add acid solution to the device, increase the temperature of the cleaning liquid to 80℃, and clean the part, the acid solution is dilute hydrochloric acid solution;

[0077] S2, take out the part and dry the surface liquid, put it in the air furnace, and increase the temperature in the air furnace to 280℃, preheat for 35min;

[0078] S3, the preheating part is taken out, and a layer of salt material is laid on the surface of the part, and then the part is placed in a heating furnace, the heating temperature is increased to 600 DEG C, and maintained for 53 min;

[0079] S4, the part is taken out and placed in an oxidation furnace, the oxidation temperature is set to 390 DEG C, and maintained for 2 h, so that the part is subjected to certain oxidation treatment;

[0080] S5, the oil is taken out and placed in a cooling barrel, when the temperature of the part reaches 230 DEG C, the part is placed in the barrel for oil cooling, and the oil is No. 180 solvent oil;

[0081] S6, the part is taken out, and the outer part is cleaned with 38 DEG C degreasing agent;

[0082] S7, two metal plane plates and a metal chain are taken out, the two metal plane plates are polished and polished to ensure the flatness of the two metal plane plates;

[0083] S8, the two metal plane plates are tightly attached to the upper and lower surfaces of the part, and no gap is generated between the two metal plane plates, and the metal chain is wound outside the two metal plane plates, and the metal chain is locked;

[0084] S9, a knocking hammer is used to gently knock the upper and lower surfaces of the two metal plane plates for 6 times, and whether the metal slag falls off is observed, if the metal slag falls off, it indicates that the treatment fails and needs to be reprocessed, if the metal slag does not fall off, it indicates that the treatment is successful.

[0085] The above is the preferred embodiment of the present application, it should be pointed out that for ordinary skilled in the art, without departing from the principles described in the present application, a number of improvements and refinements can be made, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A novel method for controlling the amount of thermal distortion in the machining of a part, characterized by: It comprises the following steps: S1, take the parts to be processed, put it in the cleaning device, add acid solution to the device, improve the temperature of the cleaning solution, clean the parts; S2, take out the parts to dry the surface liquid, put it in the air furnace, improve the temperature in the air furnace, preheat for a period of time; S3, take out the preheated parts, spread a layer of salt on the surface of the parts, then put them in the heating furnace, improve the heating temperature, and keep for a period of time; S4, take the parts, put them in the oxidation furnace, set the oxidation temperature, keep for a period of time, and make the parts undergo certain oxidation treatment; S5, take the oil, put it in the cooling barrel, when the temperature of the parts reaches a certain degree, put the parts in the barrel for oil cooling; S6, take out the parts, clean the outside of them; S7, take two metal flat plates and metal chains, process the two metal flat plates; S8, tightly attach the two metal flat plates to the upper and lower surfaces of the parts respectively, and then wrap the metal chains outside the two metal flat plates; S9, use a knocking hammer to gently knock the upper and lower surfaces of the two metal flat plates several times, and observe.

2. The novel method of controlling the amount of heat distortion in the machining of a part according to claim 1, wherein, In S1, take the parts to be processed, put them in the cleaning device, add acid solution to the device, improve the temperature of the cleaning solution to 70-80℃, clean the parts, and the acid solution is dilute hydrochloric acid solution.

3. The novel method of controlling the amount of heat distortion in the machining of a part according to claim 1, wherein, In S2, take out the parts to dry the surface liquid, put them in the air furnace, improve the temperature in the air furnace to 260-280℃, and preheat for 25-35min.

4. The novel method of controlling the amount of heat distortion in the machining of a part according to claim 1, wherein, In S3, take out the preheated parts, spread a layer of salt on the surface of the parts, then put them in the heating furnace, improve the heating temperature to 550-600℃, and keep for 45-55min.

5. The novel method of controlling the amount of heat distortion in the machining of a part according to claim 1, wherein, In S4, take the parts, put them in the oxidation furnace, set the oxidation temperature to 380-400℃, keep for 1-2h, and make the parts undergo certain oxidation treatment.

6. The novel method of controlling the amount of heat distortion in the machining of a part according to claim 1, wherein, In S5, take the oil, put it in the cooling barrel, when the temperature of the parts reaches 220-240℃, put the parts in the barrel for oil cooling, and the oil is No. 180 solvent oil.

7. The novel method of controlling the amount of heat distortion in the machining of a part according to claim 1, wherein, In S6, take out the parts, use a 30-40℃ degreasing agent to clean the outside of them.

8. The novel method of controlling the amount of heat distortion in the machining of a part according to claim 1, wherein, In S7, take two metal flat plates and metal chains, polish and grind the two metal flat plates to ensure the flatness of the two metal flat plates.

9. The novel method of controlling the amount of heat distortion in the machining of a part according to claim 1, wherein, In S8, tightly attach the two metal flat plates to the upper and lower surfaces of the parts respectively, and there should be no gap between them, then wrap the metal chains outside the two metal flat plates, and lock the metal chains.

10. The novel method of controlling the amount of heat distortion in the machining of a part according to claim 1, wherein, In S9, use a knocking hammer to gently knock the upper and lower surfaces of the two metal flat plates 5-7 times, and observe whether there is metal slag falling off, if there is, it means the treatment fails and needs to be reprocessed, if not, it means the treatment is successful.

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