Equipment for heat treatment of small parts

Abstract

The utility model relates to equipment for heat treatment of small parts. The equipment comprises a box-type furnace body, a furnace door assembly and a cooling liquid tank body, the box-type furnace body comprises a first fire-resistant heat preservation layer, heating elements and a furnace body shell, the furnace body shell is arranged on the outer side of the first fire-resistant heat preservation layer, and the heating elements are arranged on the inner side of the first fire-resistant heat preservation layer. The furnace door assembly is connected to the guide rail moving system in a sliding mode to move, the furnace door assembly is connected with the protective cover assembly, the protective cover assembly comprises an upper protective cover, a communicating pipe and an air inlet pipe, and the furnace door assembly is fixedly connected with the upper protective cover through the communicating pipe. A conventional common box-type furnace is adopted, and through the designed structure and operation and use modes and methods, the problem of oxidation of small workpieces or samples during high-temperature heating is solved, and the problem of rapid quenching cooling after heating is solved; and the heat treatment high-temperature heating oxidation problem of small workpieces and test samples and the rapid cooling problem during quenching are perfectly solved.

Description

Technical Field

[0001] The invention belongs to the field of material heat treatment equipment, in particular to equipment used for heat treatment of small parts. Background Art

[0002] Small parts or small test samples should avoid oxidation during high-temperature heating during the heat treatment process. After heating, they need to be quickly put into water or oil for cooling. Large industrial equipment with relatively high prices is extremely inconvenient to use. In small test heat treatment furnaces, box furnaces cannot solve the problem of oxidation of heated workpieces. Vacuum stainless steel tube furnaces can solve the heating oxidation problem when vacuum heating, but in a high-temperature state, when the workpiece is taken out and the furnace door is opened, the workpiece will be oxidized. At the same time, the process of taking out the workpiece at a high temperature and putting it into water is also very laborious. There has been no relatively low-cost, practical and reliable method to solve the heat treatment problem of small workpieces or test samples. Therefore, a device for heat treatment of small parts is proposed. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the following technical problems in the prior art: small parts or small test samples must avoid oxidation during high-temperature heating during the heat treatment process, and must be quickly put into water or oil for cooling after heating. Large industrial equipment with relatively high prices is extremely inconvenient to use. In small test heat treatment furnaces, box furnaces cannot solve the problem of oxidation of heated workpieces. Vacuum stainless steel tube furnaces can solve the heating oxidation problem when vacuum heating, but in a high-temperature state, when the workpiece is taken out and the furnace door is opened, the workpiece will be oxidized. At the same time, the process of taking out the workpiece in a high-temperature state and putting it into water is also very laborious. There has been no method with relatively low equipment cost, practical and reliable to solve the heat treatment problem of small workpieces or test samples.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an apparatus for heat treatment of small parts, comprising: a box-type furnace body, a furnace door assembly, and a cooling liquid tank body;

[0006] The box-type furnace body comprises a refractory insulation layer 1, a heating element and a furnace body shell, wherein the furnace body shell is arranged on the outer side of the refractory insulation layer 1, a plurality of heating elements are arranged on the inner side of the refractory insulation layer 1, wherein the heating elements are heating resistors, and the inner cavity of the refractory insulation layer 1 is a furnace;

[0007] The furnace door assembly is slidably connected to the guide rail moving system for movement, and the furnace door assembly is connected to the protective cover assembly, and the protective cover assembly includes a protective upper cover, a connecting pipe and an air inlet pipe. There are two connecting pipes, and both are fixedly connected to the protective upper cover. One of the connecting pipes passes through the furnace door assembly and reaches the outside of the box-type furnace body and is connected to the air inlet pipe. A protective cover bottom plate is installed at the bottom of the protective upper cover, and parts to be processed are placed on the protective cover bottom plate. The protective inert gas of the box-type furnace body can pass into the protective cover assembly through the air inlet pipe and the connecting pipe.

[0008] When the furnace door assembly is closed and heating begins, inert protective gas is introduced into the protective cover assembly. When heating is completed and quenching is required, the furnace door assembly is removed, and the protective cover assembly is moved out of the furnace door assembly opening together with it. The protective cover bottom plate and the parts on it fall into the coolant tank, completing the quenching of the parts.

[0009] As a preferred technical solution for equipment for heat treatment of small parts, the guide rail moving system includes a top beam fixedly installed on the top of the box-type furnace body, a guide rail is installed on the top beam, a slider is provided on the guide rail and moves along the guide rail, and an inner travel switch and an outer travel switch are installed on the top beam;

[0010] The travel switch and the outer travel switch are movably connected to the furnace door assembly.

[0011] As a preferred technical solution for equipment for heat treatment of small parts, a second refractory insulation layer is arranged inside the furnace door assembly, and the outside of the furnace door assembly is a furnace door shell, the furnace door shell is fixedly connected with a vertical plate, the vertical plate is fixedly connected with a slider mounting plate, and the slider mounting plate is fixedly connected with the slider;

[0012] And move forward and backward along the guide rail together with the furnace door assembly and the slide block.

[0013] As a preferred technical solution for equipment used for heat treatment of small parts, another of the connecting pipes extends to the outside of the protective cover assembly and is connected to the detection instrument and the pressure sensor;

[0014] The pressure sensor is used to detect the pressure of the protective gas in the protective cover assembly.

[0015] As a preferred technical solution for equipment used for heat treatment of small parts, a valve is fixedly connected between the protective inert gas inlet pipe outside the furnace door assembly and the furnace door assembly;

[0016] The valve controls the on and off of the protective gas in the protective inert gas inlet pipe.

[0017] The beneficial effects of the equipment for heat treatment of small parts of the present invention are as follows: a conventional ordinary box-type furnace is used, and the oxidation problem of small workpieces or samples during high-temperature heating is solved through the designed structure and operation method, and the problem of rapid quenching and cooling after heating is solved. Through the low-cost box-type heating furnace, the high-temperature heating oxidation problem of heat treatment of small workpieces and test samples and the problem of rapid cooling during quenching are perfectly achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 It is a front structural schematic diagram of the present invention;

[0020] Figure 2 It is a side structural schematic diagram of the present invention;

[0021] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0022] Figure 4 For the present invention Figure 3 Schematic diagram of the cross-sectional structure in the AA direction;

[0023] Figure 5 For the present invention Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure markings: 1-box furnace body; 11-refractory insulation layer one; 12-heating element; 13-furnace body shell; 2-guide rail movement system; 21-top beam; 22-guide rail; 23-slider; 24-inner travel switch; 25-outer travel switch; 3-furnace door assembly; 31-furnace door shell; 32-refractory insulation layer two; 33-vertical plate; 34-slider mounting plate; 4-coolant tank body; 41-tank body; 42-quenching coolant; 5-protective cover assembly; 51-protective upper cover; 52-protective cover bottom plate; 53-connecting pipe; 54-display instrument; 55-pressure sensor; 56-parts; 57-valve; 58-intake pipe. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] like Figure 1-6 As shown, the present invention provides a device for heat treatment of small parts, comprising: a box-type furnace body 1, a furnace door assembly 3, and a cooling liquid tank body 4;

[0031] The box-type furnace body 1 includes a refractory insulation layer 11, a heating element 12 and a furnace body shell 13, wherein the furnace body shell 13 is arranged outside the refractory insulation layer 11, and a plurality of heating elements 12 are arranged inside the refractory insulation layer 11, wherein the heating element 12 is a heating resistor, and the inner cavity of the refractory insulation layer 11 is a furnace;

[0032] The furnace door assembly 3 is slidably connected to the guide rail moving system 2 for movement. The furnace door assembly 3 is connected to the protective cover assembly 5. The protective cover assembly 5 includes a protective upper cover 51, a connecting pipe 53 and an air inlet pipe 58. There are two connecting pipes 53, both of which are fixedly connected to the protective upper cover 51. One of the connecting pipes 53 passes through the furnace door assembly 3 and reaches the outside of the box-type furnace body 1 to be connected to the air inlet pipe 58. A protective cover bottom plate 52 is installed at the bottom of the protective upper cover 51. Parts 56 to be processed are placed on the protective cover bottom plate 52. The protective inert gas of the box-type furnace body 1 can be passed into the protective cover assembly 5 through the air inlet pipe 58 and the connecting pipe 53.

[0033] When the furnace door assembly 3 is closed and heating begins, an inert protective gas is introduced into the protective cover assembly 5. When heating is completed and quenching is required, the furnace door assembly 3 is removed, and the protective cover assembly 5 is moved out of the furnace door assembly 3 together with it. The protective cover bottom plate 52 and the parts 56 thereon fall into the coolant tank, completing the parts quenching treatment.

[0034] As a preferred technical solution for equipment for heat treatment of small parts, the guide rail moving system 2 includes a top beam 21 fixedly installed on the top of the box-type furnace body 1, a guide rail 22 is installed on the top beam 21, a slider 23 is provided on the guide rail 22 and moves along the guide rail, and an inner travel switch 24 and an outer travel switch 25 are installed on the top beam 21;

[0035] The models of the inner travel switch 24 and the outer travel switch 25 are both JDHK-3GL. The model of the valve 57 is KN-05-310-HN.

[0036] The inner travel switch 24, the outer travel switch 25 and the valve 57 are all electrically connected to a single chip microcomputer, the model of which is MCF51QU32VFM.

[0037] The model of the detection instrument 54 is WE-ZR; the protective cover bottom plate 52 and the protective upper cover 51 are bonded together, and high temperature will melt the glue and automatically separate the two.

[0038] The travel switch 24 and the outer travel switch 25 are movably connected to the furnace door assembly 3 .

[0039] As a preferred technical solution for equipment for heat treatment of small parts, a fire-resistant insulation layer 32 is installed inside the furnace door assembly 3, and the outside of the furnace door assembly 3 is a furnace door shell 31, and the furnace door shell 31 is fixedly connected to a vertical plate 33, and a slider mounting plate 34 is fixedly connected to the vertical plate 33, and the slider mounting plate 34 is fixedly connected to the slider 23;

[0040] It moves forward and backward along the guide rail 22 together with the furnace door assembly 3 and the slide block 23 .

[0041] As a preferred technical solution for a device for heat treatment of small parts, another connecting pipe 53 extends to the outside of the protective cover assembly 5 and is connected to a detection instrument 54 and a pressure sensor 55;

[0042] The pressure sensor 55 is used to detect the pressure of the protective gas in the protective cover assembly 5 .

[0043] The model of the pressure sensor 55 is SSM-P202S;

[0044] As a preferred technical solution for equipment used for heat treatment of small parts, a valve 57 is also fixedly connected between the protective inert gas inlet pipe 58 outside the furnace door assembly 3 and the furnace door assembly 3;

[0045] The valve 57 controls the on and off of the protective gas in the protective inert gas inlet pipe 58 .

[0046] The specific implementation method is as follows: the heat treatment process of small parts is as follows:

[0047] S1, control the furnace door assembly 3 to be away from the box-type furnace body 1, open the furnace door assembly 3, install the protective cover bottom plate 52 with the parts 56 mounted thereon under the protective upper cover 51, and push the furnace door assembly 3 and the protective cover assembly 5 together into the furnace of the box-type furnace body 1;

[0048] S2. When the position is reached, the internal travel switch 24 gives a signal, the valve 57 is turned on, and the protective gas is introduced into the protective cover assembly 5 to start heating and heat preservation;

[0049] S3, the amount of protective gas introduced is determined by the pressure sensor 55, ensuring that the protective cover assembly 5 reaches the positive pressure set value. When the pressure in the protective cover assembly 5 is lower than the set value, the amount of protective gas introduced is increased; when the pressure in the protective cover assembly 5 is higher than the set value, the amount of protective gas introduced is reduced;

[0050] S4. After the heating and heat preservation is completed, the furnace door assembly 3 and the protective cover assembly 5 are moved outward, so that the protective cover bottom plate 52 and the parts fall into the coolant in the coolant tank body 4. When the position of the outer stroke switch 25 is reached, a signal is given, the valve 57 is closed, and the protective gas supply is stopped.

[0051] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for heat treatment of small parts, characterized in that: include: Box-type furnace body (1), furnace door assembly (3), and cooling liquid tank body (4); The box-type furnace body (1) comprises a refractory heat-insulating layer (11), a heating element (12) and a furnace body shell (13); the furnace body shell (13) is arranged on the outside of the refractory heat-insulating layer (11), and a plurality of heating elements (12) are arranged on the inside of the refractory heat-insulating layer (11); The furnace door assembly (3) is slidably connected to the guide rail moving system (2) for movement. The furnace door assembly (3) is connected to the protective cover assembly (5). The protective cover assembly (5) includes a protective upper cover (51), a connecting pipe (53) and an air intake pipe (58). There are two connecting pipes (53), both of which are fixedly connected to the protective upper cover (51). One of the connecting pipes (53) passes through the furnace door assembly (3) and reaches the outside of the box-type furnace body (1) to be connected to the air intake pipe (58). A protective cover bottom plate (52) is installed at the bottom of the protective upper cover (51), and the parts to be processed (56) are placed on the protective cover bottom plate (52).

2. The device for heat treatment of small parts according to claim 1, characterized in that: The guide rail moving system (2) comprises a top beam (21) fixedly mounted on the top of the box-type furnace body (1), a guide rail (22) being mounted on the top beam (21), a slider (23) being mounted on the guide rail (22) and moving along the guide rail, and an inner travel switch (24) and an outer travel switch (25) being mounted on the top beam (21); The travel switch (24) and the outer travel switch (25) are movably connected to the furnace door assembly (3).

3. The device for heat treatment of small parts according to claim 1, characterized in that: A second fire-resistant insulation layer (32) is arranged inside the furnace door assembly (3), and the outside of the furnace door assembly (3) is a furnace door shell (31). The furnace door shell (31) is fixedly connected to a vertical plate (33), and a slider mounting plate (34) is fixedly connected to the vertical plate (33). The slider mounting plate (34) is fixedly connected to the slider (23).

4. The device for heat treatment of small parts according to claim 1, characterized in that: The other connecting pipe (53) extends to the outside of the protective cover assembly (5) and is connected to the detection instrument (54) and the pressure sensor (55).

5. The device for heat treatment of small parts according to claim 1, characterized in that: A valve (57) is also fixedly connected between the protective inert gas inlet pipe (58) outside the furnace door assembly (3) and the furnace door assembly (3).

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