Workpiece heat treatment air cooling device

Abstract

The utility model discloses a workpiece heat treatment air cooling device which comprises a supporting frame, a material frame rotating system, an axial flow fan and a control system, and the supporting frame has the functions of supporting the axial flow fan, fixing the material frame rotating system and determining the position relation of the material frame rotating system. The control system comprises a material frame bearing platform control system, an axial flow fan control system and a control panel, the control panel is arranged on the surface of the control system, the material frame bearing platform control system is used for controlling operation of the material frame rotating system, and the axial flow fan control system is used for controlling operation of the axial flow fan. According to the utility model, the material frame rotating system and the material frame bearing platform control system are additionally arranged, so that key links in a heat treatment process are improved by the innovative measure. According to the utility model, the material frame can stably and continuously rotate in the cooling process after heat treatment, so that the problems of non-uniform cooling and overlong cooling time in the heat treatment air cooling process are effectively solved.

Description

Technical Field

[0001] The utility model belongs to the field of heat treatment technology, and in particular relates to a device that requires air cooling during the normalizing or tempering process of a workpiece (casting, forging, structural part, etc.) after heat treatment. Background Art

[0002] 1. Heat treatment

[0003] 1. Heat treatment process:

[0004] Workpieces (castings, forgings, structural parts, etc.) generally require heat treatment to further improve their structure and release stress in order to fully realize their performance advantages. Heat treatment processes include normalizing (such as air cooling), tempering, quenching (such as mist cooling, water quenching, oil quenching, quenching liquid), and annealing. Heat treatment is a process in which a workpiece is heated to a certain temperature in a designated heating device and then cooled using different cooling methods to achieve different mechanical properties.

[0005] 2. Heat treatment process:

[0006] The heat treatment process includes stacking the workpieces in a heat treatment furnace in a certain manner, heating them in a sealed heat treatment furnace according to a predetermined heating process (heating temperature and holding time), then taking the workpieces out of the heat treatment furnace and cooling them to room temperature according to a predetermined cooling method.

[0007] 3. Heat treatment furnace:

[0008] The performance requirements of the workpiece are different, the heat treatment process is also different, and the heat treatment equipment is also different. It is precisely because of the diversity of heat treatment process types and the shape and size of heat-treated workpieces that the heat treatment heating methods, furnace types and structures are also diverse. There are many ways to classify heat treatment furnaces, and different classification methods represent their different characteristics:

[0009] (1) According to the mechanization method: roller hearth furnace, walking beam furnace, trolley furnace, external mechanized chamber furnace, chain furnace, rotary hearth furnace, vibrating hearth furnace, bell furnace, etc.

[0010] (2) According to the maximum temperature: furnace temperature greater than 1000℃ is a high-temperature heat treatment furnace; 650-1000℃ is a medium-temperature heat treatment furnace; below 650℃ is a low-temperature heat treatment furnace;

[0011] (3) According to the main types of heat treatment processes: chemical heat treatment furnaces such as solid solution, quenching, normalizing, tempering, annealing and carburizing;

[0012] (4) According to the production operation mode: periodic and continuous heat treatment furnaces;

[0013] (5) According to the heating mode: divided into direct heating mode, such as open fire stove, etc.; indirect heating mode, such as radiant tube furnace, muffle furnace, etc.;

[0014] (6) According to the heating source: there are coal-fired furnace, oil-fired furnace and gas furnace with fuel combustion as the heat source; in addition, there are resistance furnace, electrode furnace, induction heating furnace, etc. with electric energy as the heat source;

[0015] (7) According to the heating medium in the furnace: with gas as the heating medium, such as air, flue gas, controlled atmosphere, vacuum, etc.; with liquid as the heating medium, such as molten salt, molten lead, etc.; with solid as the heating medium, such as flow particle furnace, etc.

[0016] Common heat treatment furnaces include box-type resistance (gas) furnace, pit-type resistance furnace, gas carburizing furnace and salt bath furnace, etc.

[0017] The utility model mainly aims at the workpiece after various heat treatment furnaces heat treatment, need strong wind cooling heat treatment process.

[0018] II. Process requirements and current problems of heat treatment air cooling:

[0019] 1. The quenching process of heat treatment is different according to different quenching medium, and the process requirements are also different. The quenching process requirements of heat treatment mainly include the formulation and implementation of quenching cooling process, the use requirements of quenching cooling medium, the technical requirements of quenching cooling equipment, quality control and inspection, and safety production and environmental protection. The specific requirements are as follows:

[0020] (1) Formulation and implementation of quenching cooling process: ensure temperature control, time management and medium selection in quenching process to achieve the expected hardening and deformation control effect.

[0021] (2) Use requirements of quenching cooling medium: select appropriate quenching medium, such as air, water (including water mist), oil and other media, according to the material and shape complexity of workpiece, to ensure the quenching effect and the quality of workpiece.

[0022] (3) Technical requirements of quenching cooling equipment: the equipment should have stable temperature control and quenching medium circulation system to ensure uniform quenching of workpiece.

[0023] (4) Quality control and inspection: after the completion of heat treatment process of workpiece, necessary hardness test, metallographic analysis, etc. are carried out to ensure that the workpiece meets the expected mechanical properties and microstructure process requirements.

[0024] (5) Safety production and environmental protection: the safety of equipment and environment in the heat treatment process, safety operation procedures, reduction of environmental pollution and safety operation of workers are ensured.

[0025] For a particular material, the heat treatment process and its process requirements are directly determined by the wear resistance, toughness, hardness and other aspects of the material to ensure the service life and performance of the workpiece.

[0026] The normalizing process of heat treatment generally refers to that the cooling medium is air, and the air cooling process of heat treatment is that the workpiece is quickly cooled to room temperature by strong air after being taken out from the high-temperature heat treatment furnace. Since the size and structure of the castings are different, the loading and unloading modes are different. If the heat treatment furnace loads only one casting or workpiece at a time, the loading and unloading modes are single lifting by using hooks and other tools. If various castings or workpieces of different sizes need to be loaded in one furnace, a supporting plate is needed to place the castings or workpieces on the supporting plate, and then the supporting plate is lifted by using hooks or self-made simple lifting tools to complete the loading or unloading action, and then the workpiece is placed in the specified air cooling area. During the air cooling process, the workpiece needs to be uniformly cooled.

[0027] 2. The main problems existing in the current air cooling process mode are:

[0028] (1) Single piece (single support) unloading, using crane hook auxiliary or placing on fixed shelves after unloading, and then using fixed position axial flow fan strong air cooling. The main disadvantage is that the cooling speed of the workpiece is inconsistent in up and down and four directions, which leads to different hardness of each part of the workpiece, and thus the performance of the overall structure of the workpiece appears large difference;

[0029] (2) Low unloading efficiency. Since the cooling is in a fixed position, the workpiece cooling speed is slow, and the cooling cannot be completed within the specified time, so that the performance of the workpiece cannot meet the requirements of the heat treatment process.

[0030] The disclosure of the above background art content is only used to assist in understanding the concept and technical scheme of the present utility model, and it does not necessarily belong to the prior art of the present patent application. In the absence of explicit evidence that the above content has been disclosed on the filing date of the present patent application, the above background art should not be used to evaluate the novelty and inventiveness of the present application. Utility model content

[0031] In order to overcome the shortcomings of the prior art, the purpose of the present utility model is to provide a workpiece heat treatment air cooling device to solve the problems of uneven cooling and long cooling time in the heat treatment air cooling process.

[0032] In order to achieve the above technical purpose, the present utility model adopts the following technical scheme:

[0033] The device for air cooling of workpiece heat treatment comprises a support frame, a material frame rotating system, an axial flow fan and a control system, the support frame supports the axial flow fan, fixes the material frame rotating system and determines the positional relationship, the control system comprises a material frame supporting platform control system, an axial flow fan control system and a control panel, the control panel is arranged on the surface of the control system, the material frame supporting platform control system is used for controlling the operation of the material frame rotating system, and the axial flow fan control system is used for controlling the operation of the axial flow fan.

[0034] Further, the material frame rotating system comprises a shaft sleeve base, a thrust ball bearing, a steel shaft, a key pin, a chain, a chain wheel A, a motor, a chain wheel B and a material frame supporting platform.

[0035] Further, the material frame supporting platform is welded by 20-30 mm thick Q235 steel plates, the material frame supporting platform is a circular support frame with a diameter of 2 m, and the rotating speed of the material frame supporting platform is 5-10 r / min.

[0036] Further, the steel shaft has a diameter of 100-200 mm and is made of Q235 steel after quenching and tempering treatment, the chain wheel A and the chain wheel B are made of Q235 steel after quenching and tempering treatment, and the power of the motor is selected as 5.5-15 KW.

[0037] Further, the axial flow fan is fixed by a fan fixing clamp and then is integrally bolted on the support frame.

[0038] Further, the axial flow fan uses a two-layer four-design, which is symmetrical in the horizontal direction, is divided into two layers, the center line height direction of the first layer of axial flow fans is consistent with the horizontal plane height of the material frame supporting platform, the center line height direction of the second layer of axial flow fans is higher than that of the first layer of axial flow fans by 2H, the outlets of all the four axial flow fans are aligned with the material frame, and the center line and the horizontal direction have an angle of +45 degrees or -45 degrees.

[0039] Further, the power of the axial flow fan is 5.5-15 KW.

[0040] Further, the control panel is provided with a material frame supporting platform control system button and an axial flow fan control system button.

[0041] Further, the material frame supporting platform control system button comprises a speed regulating switch button and a stop button, and is used for controlling the rotation speed regulation and stop of the material frame supporting platform.

[0042] Further, the axial flow fan control system button comprises a start button and a stop button, and is used for controlling the start and stop of the axial flow fan.

[0043] The device has the following technical advantages:

[0044] 1. The utility model adds material frame rotation system and material frame bearing platform control system, this innovation initiative promotes the key link among heat treatment process. The utility model can make the material frame rotate steadily and continuously in the cooling process after heat treatment, thereby avoid the problem of uneven heat distribution caused by static cooling. This improvement not only promotes the uniform loss of heat, but also reduces the temperature gradient of the heat treated workpiece during the cooling process, thereby ensuring the uniformity of workpiece cooling, laying a solid foundation for subsequent processing.

[0045] 2. The efficiency of the furnace discharge link has been improved, the utility model design allows heat treatment furnace to process and discharge multiple workpieces in the same batch, greatly shortens the production cycle and improves the overall production efficiency. By optimizing the discharge path and enhancing the carrying capacity of the discharge mechanism, the utility model can complete the synchronous discharge operation of multiple workpieces, reduce the waiting time and ensure the smooth operation of the production line. This improvement is of great significance to improve productivity and reduce cost.

[0046] 3. Due to the above-mentioned improvement of cooling uniformity, the performance of each part of the workpiece after heat treatment is guaranteed. The application of the rotating device ensures that the workpiece surface and internal can obtain consistent cooling effect, avoiding the problem of local hardness difference and stress concentration caused by uneven cooling. This optimization measure not only improves the overall quality of the workpiece, but also ensures that each workpiece can meet the performance indicators of the design requirements, such as hardness, toughness, fatigue strength, etc. Therefore, whether in precision manufacturing, aerospace or automobile manufacturing, these carefully heat-treated and uniformly cooled workpieces can exhibit good performance, providing support for the reliability and durability of the final product. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is the device perspective view of the workpiece heat treatment air cooling of the utility model;

[0048] Figure 2 is the device front view of the workpiece heat treatment air cooling of the utility model;

[0049] Figure 3 is the device left view of the workpiece heat treatment air cooling of the utility model;

[0050] Figure 4 is the device right view of the workpiece heat treatment air cooling of the utility model;

[0051] Figure 5 is the device top view of the workpiece heat treatment air cooling of the utility model;

[0052] Figure 6 is the device bottom view of the workpiece heat treatment air cooling of the utility model;

[0053] Figure 7 This is a schematic diagram of the disassembled structure of the material frame rotation system of the utility model;

[0054] Figure 8 This is a three-dimensional diagram of the fan fixing clamp;

[0055] Figure 9 This is the main view of the fan fixing clamp;

[0056] Figure 10 This is a top view of the fan fixing clamp;

[0057] Figure 11 This is a three-dimensional diagram of the axial flow fan and the fan fixing hoop;

[0058] Figure 12 This is the main view of the axial flow fan and the fan fixing clamp;

[0059] Figure 13 This is a top view of the axial flow fan and the fan fixing clamp;

[0060] Figure 14 It is a schematic diagram of the control panel structure. DETAILED DESCRIPTION

[0061] The present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following description is merely illustrative and is not intended to limit the scope and application of the present invention.

[0062] See also Figures 1-14 The workpiece heat treatment air cooling device of the present invention includes a support frame 1, a material frame rotation system 2, an axial flow fan 3, and a control system 4;

[0063] The material frame rotation system 2 includes a sleeve base 21, a thrust ball bearing 22, a steel shaft 23, a key pin 24, a chain 25, a sprocket A 26, a motor 27, a sprocket B 28, and a material frame load-bearing platform 29;

[0064] The control system 4 includes a material frame load-bearing platform control system, an axial flow fan control system and a control panel. The control panel is arranged on the surface of the control system. The material frame load-bearing platform control system is used to control the operation of the material frame rotation system, and the axial flow fan control system is used to control the operation of the axial flow fan.

[0065] The control panel is provided with buttons for the material frame load-bearing platform control system and buttons for the axial flow fan control system. The buttons for the material frame load-bearing platform control system include a speed control switch button and a stop button, which are respectively used to control the rotation speed and stop of the material frame load-bearing platform;

[0066] The axial flow fan control system button includes a start button and a stop button, respectively used for controlling the start and stop of the axial flow fan.

[0067] The support frame mainly supports the axial flow fan, fixes the material frame rotating system and determines the positional relationship thereof. The steel structure of the support frame is generally designed according to the size of the axial flow fan, and is welded into a whole according to the drawing requirement by using Q235B material of equal angle steel 40*40*4.

[0068] The material frame is a circular material frame or a square material frame. The outer diameter (or the maximum outer diameter of the square material frame) is D, the height of the material frame is H (determined according to the heat-treated workpiece and the inner size of the heat treatment furnace), the horizontal distance between the outlet end of the axial flow fan and the maximum outer diameter of the material frame is selected as D, the height direction of the center line of the first layer of axial flow fan is consistent with the height of the horizontal plane of the material frame bearing platform, the height direction of the center line of the second layer of axial flow fan is higher than that of the first layer of axial flow fan by 2H, the outlets of all the four axial flow fans are aligned with the material frame, and the included angle between the center line and the horizontal direction is +45 degrees or -45 degrees. The height of the material frame bearing platform from the ground is 1-1.5 meters.

[0069] The axial flow fan can be selected as a large air volume JSF-A type. According to the size of the heat-treated workpiece and the amount of one-time processing, a power of 5.5-15KW can be selected. The axial flow fan is fixed by a fan fixing clamp and then integrally bolted on the support frame. The axial flow fan uses two layers and four designs, which are symmetrically arranged in the horizontal direction and divided into upper and lower layers.

[0070] Manufacture of the material frame rotating system:

[0071] 1. The material frame rotating system includes a shaft sleeve base, a thrust ball bearing, a steel shaft, a key pin, a chain, a chain wheel A, a motor, a chain wheel B and a material frame bearing platform.

[0072] 2. The material frame bearing platform is welded into a whole according to the drawing requirement by using Q235 steel plate with a thickness of 20-30 millimeters. The material frame bearing platform is connected in a whole with the chain transmission chain wheel screw bolt or welded by a channel steel (No. 5-10) reinforcing rib.

[0073] 3. The chain wheel is made of Q235 quenched and tempered steel, and the transmission ratio of the transmission motor is selected to make the rotation speed of the material frame system 10-20 revolutions per minute as the design principle. The chain wheel diameter is generally 0.6-0.8D, and the chain length is selected according to the diameter of the chain wheel and the maximum outer diameter of the chain wheel transmission motor from the material frame by more than one D as the principle. The size of the transmission motor is determined by the chain wheel transmission ratio and the total weight of the load, and the safety factor is 2-3. Generally, 5.5-15KW power is selected.

[0074] 4. The diameter of the steel shaft is calculated according to the total weight of the load, and is generally selected as 100-200mm in diameter. The material is Q235 quenched and tempered. The bearing and bearing seat are selected as standard parts or according to the design requirements.

[0075] 5. The material frame rotation system is fixed by bolts and screws through the bearing, bearing seat and support frame.

[0076] 6. The material frame is welded from Q235 angle steel (generally selected as 40*40*4, determined according to actual needs) according to the drawing.

[0077] The heat treatment air cooling process includes the following steps:

[0078] (1) After the material frame is lifted out of the heat treatment furnace, it is placed on the material frame load bearing platform;

[0079] (2) Start the material frame load bearing platform control system, and the material frame load bearing platform starts to rotate at the set speed;

[0080] (3) Start the axial flow fan control system, and strong air cooling;

[0081] (4) After the workpiece is cooled to below 100℃, the axial flow fan control system and the material frame load bearing platform control system are turned off, the material frame is lifted to the designated storage location, and the heat treatment air cooling process is completed.

[0082] (5) Check the performance of the workpiece according to the subsequent heat treatment process requirements, and the heat treatment air cooling process is completed.

[0083] Manufacture of heat treatment support frame:

[0084] (1) The support frame is welded from channel steel according to the design process and drawing requirements. The main beam of the axial flow fan load bearing frame uses 10# or 20# ordinary channel steel, and the rest of the connecting parts use light 5# or 8# channel steel.

[0085] (2) The material frame load bearing platform is a circular support frame, and its diameter is determined according to the maximum length or diameter of the material frame, generally about 2 meters in diameter.

[0086] (3) The material frame bearing platform rotating mechanism uses a chain gear transmission system, and the rotating speed of the material frame bearing platform is designed to be adjustable at 5-10 revolutions per minute.

[0087] (4) The material frame bearing platform is fixed on the cement base through a main shaft, a rolling bearing, and a support auxiliary system.

[0088] Although the embodiments considered as the paradigms of the present application have been described in detail, those skilled in the art will realize that various changes and substitutions can be made to them without departing from the core idea of the present application. In addition, a large number of adjustments can also be made to adapt to specific application requirements, and these adjustments will not deviate from the basic concept of the present application. Therefore, the scope of the present application is not limited to the specific embodiments disclosed, but encompasses all embodiments and equivalent forms that meet the spirit and principles of the present application.

Claims

1. An apparatus for air cooling of a workpiece heat treatment, characterized in that, Including support frame, material frame rotating system, axial flow fan, control system, the support frame supports axial flow fan, fixed material frame rotating system and determines its position relation function, the control system includes material frame bearing platform control system, axial flow fan control system and control panel, control panel is arranged on the surface of control system, material frame bearing platform control system is used to control the operation of material frame rotating system, and axial flow fan control system is used to control the operation of axial flow fan.

2. The apparatus of claim 1, wherein, The material frame rotating system includes shaft sleeve base, thrust ball bearing, steel shaft, key pin, chain, chain wheel A, motor, chain wheel B, material frame bearing platform.

3. The apparatus of claim 2, wherein, The material frame bearing platform is welded by 20-30 millimeter thick Q235 steel plate, and the material frame bearing platform is a circular support frame with a diameter of 2 meters, and the rotating speed of the material frame bearing platform is 5-10 rounds / minute.

4. The apparatus of claim 2, wherein, The diameter of the steel shaft is 100-200 millimeters, and the material is Q235 after quenching and tempering treatment, the chain wheel A and the chain wheel B adopt Q235 quenching and tempering steel, and the power of the motor is selected to be 5.5-15KW.

5. The apparatus of claim 1 wherein, The axial flow fan is fixed by a fan fixing clamp and then is integrally bolted on the support frame.

6. The apparatus of claim 5, wherein, The axial flow fan uses two layers of four designs, which are symmetric in the horizontal direction, are divided into two layers, the center line height direction of the first layer of axial flow fan is consistent with the horizontal plane height of the material frame bearing platform, the center line height direction of the second layer of axial flow fan is higher than that of the first layer of axial flow fan by 2H, the outlets of all four axial flow fans are aligned with the material frame, and the center line and the horizontal direction have an angle of +45 degrees or-45 degrees.

7. The apparatus of claim 6, wherein, The power of the axial flow fan is 5.5-15KW.

8. The device for air cooling of heat treatment of workpieces according to claim 1, characterized in that: The control panel is provided with material frame bearing platform control system buttons and axial flow fan control system buttons.

9. The apparatus of claim 8, wherein, The material frame bearing platform control system buttons include speed regulating switch buttons and stop buttons, which are respectively used for controlling the rotation speed and stopping of the material frame bearing platform.

10. The apparatus of claim 8, wherein, The axial flow fan control system buttons include start buttons and stop buttons, which are respectively used for controlling the start and stop of the axial flow fan.

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