Low-pressure carburizing heat treatment furnace

Abstract

The utility model provides a low-pressure carburizing heat treatment furnace which comprises a charging chamber, a heating chamber and a quenching chamber, one side of the charging chamber is provided with a charging door capable of being opened and closed, the charging chamber is communicated with the heating chamber on the other side, the charging chamber is communicated with the quenching chamber, the charging chamber is provided with a workpiece moving device, the workpiece moving device is provided with a bearing plate, the length of the bearing plate ranges from 3 m to 5 m, and the bearing plate is provided with a workpiece. The width of the steel wire rope is between 1m and 2m; a carburizing device is arranged in the heating chamber and comprises a carburizing pipeline with a nozzle facing the interior of the heating chamber. The quenching chamber is arranged below the charging chamber, vertically arranged guide rails are arranged between the charging chamber and the quenching chamber, and the workpiece moving device is movably connected with the guide rails. According to the scheme, workpieces are transferred among the charging chamber, the heating chamber and the quenching chamber through the layout of all the chambers and the bearing plates, the moving complexity of the large workpieces is reduced, the carburizing procedure is integrated into the heating chamber, the machining efficiency of the workpieces is improved, and the problem that in the prior art, the efficiency is not high when the large workpieces are subjected to carburizing and quenching treatment is solved.

Description

Technical Field

[0001] The present application relates to the technical field of equipment manufacturing, and in particular to a heat treatment furnace. Background Art

[0002] When processing products or mold parts, it is often necessary to carburize and quench the workpiece. Traditional carburizing, heating and quenching require corresponding equipment for processing. During the transfer of the workpiece, not only does it need to increase the heating amount to ensure the temperature of the workpiece, but the transfer between each process leads to low production efficiency. Especially when processing larger workpieces, each process often corresponds to its own different equipment, and the workpiece needs to be moved back and forth between the equipment, which greatly reduces production efficiency. Utility Model Content

[0003] An object of the present application is to provide a low-pressure carburizing heat treatment furnace to solve at least one of the above-mentioned problems.

[0004] The present application provides a low-pressure carburizing heat treatment furnace, comprising a charging chamber, a heating chamber and a quenching chamber, wherein one side of the charging chamber is provided with an openable charging door, the charging chamber is connected to the heating chamber at the other side, an openable insulation door is provided between the charging chamber and the quenching chamber,

[0005] The loading chamber is provided with a workpiece moving device, and the workpiece moving device has a supporting plate that can be extended into the heating chamber, and the length of the supporting plate is between 3 meters and 5 meters, and the width is between 1 meter and 2 meters;

[0006] A carburizing device is provided in the heating chamber, and the carburizing device includes a carburizing pipeline with a nozzle facing the heating chamber;

[0007] The quenching chamber is placed below the charging chamber, and vertically arranged guide rails are provided in the charging chamber and the quenching chamber, and the workpiece moving device is movably connected to the guide rails.

[0008] Preferably, a toothed belt is provided on the lower surface of the support plate, the toothed belt extends toward the heating chamber, and the workpiece moving device is provided with gears corresponding to the toothed belt.

[0009] Preferably, the guide rail extends to the bottom surface of the quenching chamber, and when the support plate follows the workpiece moving device and moves along the guide rail to the bottom surface of the quenching chamber, the upper surface of the support plate is 3 meters to 4 meters away from the liquid level of the quenching liquid.

[0010] Preferably, the carburizing pipeline has a plurality of nozzles, and the plurality of nozzles are distributed in the heating chamber, and the distance between each nozzle is between 3 cm and 7 cm.

[0011] Preferably, the upper surface of the support plate is concave.

[0012] Preferably, after the charging door is opened, the height of the feeding channel is between 3 meters and 4 meters, and the width is between 2 meters and 3 meters.

[0013] Preferably, the height and width of the heating chamber are 7 cm to 10 cm greater than the height and width of the charging chamber.

[0014] Preferably, it also includes a thermal induction temperature control system, the thermal induction temperature control system includes a sensor, and the sensor of the thermal induction temperature control system is an infrared thermal induction sensor;

[0015] A hollow high temperature resistant tube is also provided corresponding to the infrared heat sensor, one end of the high temperature resistant tube is provided outside the heating chamber, and the other end is provided inside the heating chamber.

[0016] The infrared heat sensor is installed in the part of the high temperature resistant pipe outside the heating room.

[0017] The photosensitive surface of the infrared heat sensor faces one end of the high temperature resistant tube heating chamber;

[0018] Furthermore, the infrared heat sensor is directed toward the area within the heating chamber.

[0019] Compared with the prior art, the present application provides a low-pressure carburizing heat treatment furnace, comprising a loading chamber, a heating chamber and a quenching chamber, wherein one side of the loading chamber is provided with a loading door that can be opened and closed, and the loading chamber is connected with the heating chamber at the other side, with an openable and closable insulating door arranged therebetween, the loading chamber is connected with the quenching chamber, the loading chamber is provided with a workpiece moving device, the moving device has a supporting plate that can be extended into the heating chamber, the length of the supporting plate is between 3 meters and 5 meters, and the width is between 1 meter and 2 meters; a carburizing device is arranged in the heating chamber, the carburizing device comprises a carburizing pipeline with a nozzle facing the heating chamber; the quenching chamber is placed below the loading chamber, and vertically arranged guide rails are arranged in the loading chamber and the quenching chamber, and the workpiece moving device is movably connected to the guide rails. This solution transfers the workpiece between the loading chamber, heating chamber and quenching chamber through the layout between the chambers and the support plate, reduces the complexity of moving large workpieces, integrates the carburizing process into the heating chamber, improves the processing efficiency of the workpiece, and solves the problem of low efficiency of carburizing and quenching large workpieces in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 This is a schematic diagram of one embodiment of the low-pressure carburizing heat treatment furnace described in the present application.

[0022] The same or similar reference numerals in the drawings represent the same or similar components. DETAILED DESCRIPTION

[0023] Combine the following Figure 1 The low-pressure carburizing heat treatment furnace of the present application is further explained.

[0024] The present application provides a low-pressure carburizing heat treatment furnace, comprising a charging chamber 1, a heating chamber 2 and a quenching chamber 3, wherein one side of the charging chamber 1 is provided with a charging door 11 that can be opened and closed, and the charging chamber 1 is connected with the heating chamber 2 at the other side, and an insulating door 21 that can be opened and closed is provided between them, and the charging chamber 1 is connected with the quenching chamber 3;

[0025] The loading chamber 1 is provided with a workpiece moving device 12, and the workpiece moving device 12 has a supporting plate that can be extended into the heating chamber 2, and the length of the supporting plate is between 3 meters and 5 meters, and the width is between 1 meter and 2 meters;

[0026] A carburizing device is provided in the heating chamber 2, and the carburizing device includes a carburizing pipeline with a nozzle facing the heating chamber 2;

[0027] The quenching chamber 3 is disposed below the charging chamber 1 , and vertically arranged guide rails are provided between the charging chamber 1 and the quenching chamber 3 , and the workpiece moving device 12 is movably connected to the guide rails.

[0028] The loading chamber 1 is provided with a workpiece moving device 12, and the workpiece moving device 12 is provided with a supporting plate, and the supporting plate is used to carry the workpiece. The operator can place the workpiece on the supporting plate after the loading door 11 is opened, and close the loading door 11 after placing it. The heating chamber 2 is arranged on one side of the loading chamber 1, and the loading chamber 1 and the heating chamber 2 are insulated by an insulating door 21. When the loading door 11 is closed, the supporting plate can be moved and extended into the heating chamber 2, and the workpiece placed on it is placed into the heating chamber 2, and then the insulating door 21 is closed. The heating chamber 2 is provided with a carburizing pipeline for the carburizing process, and the nozzle of the pipeline faces the workpiece, and the carburizing liquid can be sprayed on the workpiece. The heating chamber 2 is used to perform heat treatment on the workpiece. When the workpiece 4 is heated to the required state, the insulating door 21 is opened, the support plate returns to the loading chamber 1, and moves to the quenching chamber 3 below the loading chamber 1 through the guide rail. The quenching chamber 3 can be filled with liquid for quenching, and the workpiece 4 is immersed in the quenching liquid for quenching. After completion, the support plate returns to the loading chamber 1 and brings the workpiece 4 back to the loading chamber 1.

[0029] The length of the support plate is between 3 meters and 5 meters, and the width is between 1 meter and 2 meters. It can support larger workpieces without causing the workpieces to be too large to enter the heating chamber 2. It can also impose preliminary volume restrictions on the workpieces based on the performance of the heating furnace to prevent the workpieces from being too large and the performance of the heating chamber 2 from being unable to heat the workpieces to the required state.

[0030] In some embodiments of the present application, a toothed belt is provided on the lower surface of the support plate, the toothed belt extends toward the heating chamber 2, and the workpiece moving device 12 is provided with gears corresponding to the toothed belt.

[0031] The workpiece moving device 12 is provided with a gear, which cooperates with the toothed belt on the support plate. When the gear rotates, the support plate carries the workpiece and is sent into the heating chamber 2 through the cooperation of the gear and the toothed belt. After the heating is completed, the support plate is reset by rotating the gear and cooperating with the toothed belt. The workpiece is moved to the heating chamber 2 through the cooperation of the toothed belt and the gear, which does not require manual movement, ensures the safety of the operator, and improves the connection efficiency between processes, thereby improving the production and processing efficiency.

[0032] In some embodiments of the present application, the guide rail extends to the bottom surface of the quenching chamber 3. When the support plate follows the workpiece moving device 12 and moves along the guide rail to the bottom surface of the quenching chamber 3, the upper surface of the support plate is 3 to 4 meters away from the liquid level of the quenching liquid.

[0033] The workpiece moving device 12 can go deep into the quenching liquid in the quenching chamber 3 along the guide rail, and can go deep to the bottom, so that the upper surface of the support plate is 3 meters to 4 meters away from the liquid surface of the quenching liquid. The quenching liquid can be oil used for quenching. The liquid surface height of 3 meters to 4 meters can ensure that a larger workpiece can be completely immersed in the quenching liquid. By moving the workpiece by the guide rail, the depth of the workpiece in the quenching liquid can be controlled according to the size of the workpiece, preventing the workpiece from being immersed too deeply to increase the quenching time, improving the efficiency of quenching, and thus increasing production efficiency.

[0034] In some embodiments of the present application, the carburizing pipeline has a plurality of nozzles, and the plurality of nozzles are distributed in the heating chamber 2, and the distance between each nozzle is between 3 cm and 7 cm.

[0035] After actual testing, it was found that when performing the carburizing process, controlling the distance between the nozzles between 3 cm and 7 cm can make the carbon spraying of large-sized workpieces more uniform, achieve better spraying effects, and prevent workpiece quality problems caused by substandard carbon spraying. Further optimizing the carbon spraying process can reduce the unqualified rate of workpieces in later processing, thereby increasing production efficiency.

[0036] In some embodiments of the present application, the upper surface of the supporting plate is concave.

[0037] The concave surface on the support plate can be used for spherical workpieces or some workpieces that are easy to roll, preventing them from rolling when the support plate is sent into the heating chamber 2, thereby causing uneven carbon spraying or uneven heating, affecting the quality of the workpiece. The use of a concave surface can reduce the unqualified rate of such workpieces in the later processing, thereby increasing production efficiency.

[0038] In some embodiments of the present application, after the loading door 11 is opened, the height of the feeding channel is between 3 meters and 4 meters, and the width is between 2 meters and 3 meters.

[0039] The low-pressure carburizing heat treatment furnace described in the present application is designed for heat treatment of larger workpieces. Due to the influence of the existing technical conditions of the heating chamber 2 and the quenching chamber 3, the height of the feed channel is between 3 meters and 4 meters, and the width is between 2 meters and 3 meters. Heat treatment and quenching of more suitable workpieces can be carried out. After calculation, it is found that a more costly technical solution needs to be adopted for heating and quenching of oversized workpieces. Therefore, oversized workpieces cannot enter the loading chamber 1, which ensures the later heating and quenching effect of the workpiece, prevents the unqualified rate of the workpiece in the later processing, and thus increases production efficiency.

[0040] In some embodiments of the present application, the height and width of the heating chamber 2 are 7 cm to 10 cm greater than the height and width of the charging chamber 1 .

[0041] In the experiment of measuring the heating effect of heating chamber 2, the appropriate size of heating chamber 2 is set according to the size of the workpiece in charging chamber 1 to ensure heating efficiency. It has been measured that the height and width of heating chamber 2 are 7 cm to 10 cm larger than the height and width of charging chamber 1, which can ensure that the workpiece is heated to the required temperature in a shorter time. Too large a size will increase the heating time and waste energy, while too small a size will cause some workpieces in the heating furnace to expand after heating and become stuck in the heating furnace. Therefore, setting the height and width of heating chamber 2 larger than the height and width of charging chamber 1 by 7 cm to 10 cm can ensure smooth process connection and further improve production efficiency.

[0042] In some embodiments of the present application, a thermal induction temperature control system is also included, which includes a sensor. The sensor of the thermal induction temperature control system adopts an infrared thermal induction sensor; a hollow high-temperature resistant tube is also provided corresponding to the infrared thermal sensor, one end of the high-temperature resistant tube is arranged outside the heating room, and the other end is arranged inside the heating room, the infrared thermal sensor is arranged in the part of the high-temperature resistant tube outside the heating room, and the photosensitive surface of the infrared thermal sensor faces one end of the high-temperature resistant tube inside the heating room; further, the infrared thermal sensor faces the area inside the heating room.

[0043] The thermal induction temperature control system is used to detect the temperature in the heating chamber. Setting a temperature sensor in the heating chamber will cause the temperature sensor to burn out. A hollow high-temperature resistant tube is set, one end of the high-temperature resistant tube is placed in the heating chamber, and the other end is placed outside the heating chamber. An infrared thermal induction sensor is set in the high-temperature resistant tube at one end outside the heating chamber to monitor the temperature of the heating chamber. The infrared thermal induction sensor faces the area inside the heating chamber to monitor and control the temperature of the heating chamber.

[0044] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0045] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim can also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

Claims

1. A low-pressure carburizing heat treatment furnace, comprising a charging chamber, a heating chamber and a quenching chamber, wherein one side of the charging chamber is provided with an openable charging door, the charging chamber is connected to the heating chamber at the other side, an openable insulation door is provided between the charging chamber and the quenching chamber, and the characteristics are: The loading chamber is provided with a workpiece moving device, and the workpiece moving device has a supporting plate that can be extended into the heating chamber, and the length of the supporting plate is between 3 meters and 5 meters, and the width is between 1 meter and 2 meters; A carburizing device is provided in the heating chamber, and the carburizing device includes a carburizing pipeline with a nozzle facing the heating chamber; The quenching chamber is placed below the charging chamber, and vertically arranged guide rails are provided in the charging chamber and the quenching chamber, and the workpiece moving device is movably connected to the guide rails.

2. The low-pressure carburizing heat treatment furnace according to claim 1, characterized in that: A toothed belt is provided on the lower surface of the supporting plate, the toothed belt extends toward the heating chamber, and the workpiece moving device is provided with a gear corresponding to the toothed belt.

3. The low-pressure carburizing heat treatment furnace according to claim 1, characterized in that: The guide rail extends to the bottom surface of the quenching chamber. When the support plate follows the workpiece moving device and moves along the guide rail to the bottom surface of the quenching chamber, the upper surface of the support plate is 3 to 4 meters away from the liquid surface of the quenching liquid.

4. The low-pressure carburizing heat treatment furnace according to claim 1, characterized in that: The carburizing pipeline has a plurality of nozzles, and the plurality of nozzles are distributed in the heating chamber, and the distance between each nozzle is between 3 cm and 7 cm.

5. The low-pressure carburizing heat treatment furnace according to claim 1, characterized in that: The upper surface of the supporting plate is a concave surface.

6. The low-pressure carburizing heat treatment furnace according to claim 1, characterized in that: After the charging door is opened, the height of the feeding channel is between 3 meters and 4 meters, and the width is between 2 meters and 3 meters.

7. The low-pressure carburizing heat treatment furnace according to claim 1, characterized in that: The height and width of the heating chamber are 7 cm to 10 cm greater than the height and width of the charging chamber.

8. The low-pressure carburizing heat treatment furnace according to claim 1, characterized in that: It also includes a thermal induction temperature control system, which includes a sensor. The sensor of the thermal induction temperature control system is an infrared thermal induction sensor; A hollow high temperature resistant tube is also provided corresponding to the infrared heat sensor, one end of the high temperature resistant tube is provided outside the heating chamber, and the other end is provided inside the heating chamber. The infrared heat sensor is installed in the part of the high temperature resistant pipe outside the heating room. The photosensitive surface of the infrared heat sensor faces one end of the high temperature resistant tube heating chamber; Furthermore, the infrared heat sensor is directed toward the area within the heating chamber.

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