KR102066383B1 - Heat treatment device - Google Patents

Abstract

An invention for a heat treatment apparatus is disclosed. The heat treatment apparatus of the present invention includes: a heating unit for heating a material to a set temperature, a charging unit where nitriding treatment is performed by receiving the heated material from the heating unit, and installed in at least one of the inlet and the outlet of the charging unit, It is fixed to the safety door portion and the charging unit which is moved in the direction and includes a guide rail for guiding the vertical movement of the safety door portion, the side of the safety door is provided with a plurality of guide rollers, characterized in that the vertical movement is guided along the guide rail portion It is done.

Description

Heat treatment device {HEAT TREATMENT DEVICE}

The present invention relates to a heat treatment apparatus, and more particularly, to a heat treatment apparatus that can prevent the departure of the door to improve the operation reliability.

In general, the material used in the production of the mold is processed by adding nitriding heat treatment after vacuum heat treatment. Conventionally, in the forging field, a method of heat treatment has been used to improve the life and workability of a mold, and the heat treatment method may be classified into hot forging and cold forging. In particular, in cold forging, various coating methods are applied to the surface of the mold, which is widely applied in various fields. However, in terms of working temperature, in the case of warm and hot forging (approximately 850 ℃ ~ 1200 ℃), which is worse than cold forging, the working temperature is high. The lifetime of the product depends on the quality of the processed product.

As a heat treatment method of a mold material applied to warm and hot forging and die casting, a salt bath treatment method, an electric furnace treatment method, and a vacuum furnace treatment method are used.

In the salt bath treatment method, the mold material to be heat-treated is heated to a target temperature of about 1000 to 1050 ° C. to austenite to maintain a suitable time, and then quenched in a neutral salt bath at about 500 ° C., and then cooled by air cooling. Then, the substrate is heated to about 500 ° C. to 600 ° C., and then subjected to a tempering operation two or more times to complete the heat treatment.

In addition, the electric furnace heat treatment method sets a mold in a container in which a heater is embedded and maintains it by heating to a target temperature. In this case, nitrogen gas is introduced to prevent oxidation of a product in the furnace atmosphere. The heat-treated mold is quenched by air cooling or oil cooling, and then heated to about 500 ° C. to 600 ° C. to perform a tempering operation two or more times to complete the heat treatment.

In addition, the vacuum furnace heat treatment method sets a mold to be heat-treated in a container in which a vacuum can be maintained, operates a vacuum pump to maintain an appropriate vacuum degree (10 to 10 torr), and when the power is supplied to a carbon heater, the mold is heated by resistance. It heats up to this target temperature. After maintaining a suitable time in this state, the quenching work is completed by adding and cooling nitrogen gas pressurized (2-4 bar) into the furnace, and again, the tempering work is performed twice or more by heating to about 500 to 600 ° C. To complete the heat treatment.

When heat-treating the material by the heat treatment method, the pressure inside the heat treatment furnace is high, there is a problem that a safety accident occurs that the door is released to the front. Therefore, there is a need for improvement.

Background art of the present invention is published in Republic of Korea Patent Publication No. 10-1179961 (2012.08.30 registration, the name of the invention: vacuum heat treatment furnace).

The present invention was created to improve the above problems, and an object of the present invention is to provide a heat treatment apparatus that can prevent the departure of the door to improve the operation reliability.

The heat treatment apparatus according to the present invention includes: a heating unit for heating a material to a set temperature, a charging unit where nitriding treatment is performed by receiving the heated material from the heating unit, and installed in at least one of an inlet and an outlet of the charging unit. It is fixed to the safety door portion and the charging unit which is moved in the vertical direction and includes a guide rail for guiding the vertical movement of the safety door portion, the side of the safety door is provided with a plurality of guide rollers are guided up and down each along the guide rail portion It features.

The present invention also provides a nitrogen supply unit connected to the charging unit for supplying nitrogen into the charging unit, a vacuum unit connected to the charging unit for discharging air inside the charging unit to the outside of the charging unit, and a gas inside the charging unit. It further comprises a control unit for controlling the operation of the nitrogen supply unit and the vacuum unit receives the measurement unit for measuring the pressure and the measured value of the measuring unit.

In another aspect, the present invention, the heating portion and the charging portion is connected to both sides and the connection portion forming a passage for moving the material and the connection portion facing the heating portion is installed further includes a heat insulation door portion for opening and closing the exit of the heating portion moving in the vertical direction Characterized in that.

In addition, the present invention is characterized in that it further comprises a drive unit which is driven by the control signal of the control unit and the linearly moved rod member is connected to the safety door portion to move the safety door portion in the vertical direction.

In addition, the safety door portion is connected to the plate-shaped base member, the first roller rotatably installed on the base member, the second roller provided at a position spaced apart from the first roller, and the first roller and the second roller. It characterized in that it comprises a front door connected to the link member and the second roller.

In addition, the first roller is characterized in that each installed on the lower both sides and the upper both sides of the base member.

In addition, the guide rail portion, the first guide portion to guide the vertical movement of the first roller and the first guide portion extending in the vertical direction and the second guide is installed in succession and guides the vertical movement of the second roller and extends in the vertical direction It is characterized by including a wealth.

In the heat treatment apparatus according to the present invention, since the control unit controls the operation of the nitrogen supply unit based on the measured value of the measuring unit, the inner pressure of the charging unit is prevented from rising above the set pressure, thereby preventing the safety door part from being separated, thereby improving operation reliability. have.

In addition, according to the present invention, since a plurality of rollers provided on both sides of the safety door part are guided in the vertical direction along the plurality of guide grooves provided in the guide rail part, the safety door part is prevented from being separated out of the charging part to prevent the occurrence of a safety accident. You can prevent it.

1 is a front view of a heat treatment apparatus according to an embodiment of the present invention.
2 is a perspective view showing a state in which the safety door unit is connected to the guide rail unit according to an embodiment of the present invention.
3 is a perspective view illustrating a state in which the safety door unit is moved upward along the guide rail unit according to an exemplary embodiment of the present invention.
Figure 4 is a perspective view showing a safety door unit according to an embodiment of the present invention.
Figure 5 is a perspective view of the guide roller and the link member according to an embodiment of the present invention.
Figure 6 is a perspective view showing a state in which the guide roller is caught in the guide groove according to an embodiment of the present invention.
7 is a view schematically showing the main configuration of the heat treatment apparatus according to an embodiment of the present invention.
8 is a view schematically showing the installation position of the safety door portion and the heat insulation door portion according to an embodiment of the present invention.
9 is a plan view showing a state in which the safety door unit is connected to the guide rail unit according to an embodiment of the present invention.
10 is a perspective view showing a state in which the safety door unit is connected to the guide rail unit according to an embodiment of the present invention.
11 is a block diagram of a heat treatment apparatus according to an embodiment of the present invention.

Hereinafter, a heat treatment apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, the definitions of these terms should be made based on the contents throughout the specification.

1 is a front view of a heat treatment apparatus according to an embodiment of the present invention, Figure 2 is a perspective view showing a state in which the safety door unit is connected to the guide rail portion according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention 4 is a perspective view illustrating a state in which the safety door unit is moved upward along the guide rail unit, and FIG. 4 is a perspective view of the safety door unit according to an embodiment of the present invention, and FIG. 5 is according to an embodiment of the present invention. Figure 6 is a perspective view showing a guide roller and a link member, Figure 6 is a perspective view showing a state in which the guide roller is caught in the guide groove according to an embodiment of the present invention, Figure 7 is a heat treatment apparatus according to an embodiment of the present invention 8 is a view schematically showing the main configuration, Figure 8 is a view schematically showing the installation position of the safety door portion and the insulating door portion according to an embodiment of the present invention, Figure 9 is according to an embodiment of the present invention 10 is a plan view illustrating a state in which the safety door unit is connected to the guide rail unit, and FIG. 10 is a perspective view illustrating a state in which the safety door unit is connected to the guide rail unit, and FIG. 11 is in accordance with an embodiment of the present invention. A block diagram of a heat treatment apparatus.

1 to 11, the heat treatment apparatus 1 according to an exemplary embodiment of the present invention includes a heating unit 10 and a heating unit 10 for heating the material 110 to a set temperature. And a safety door part which is installed in at least one of the inlet part 22 and the outlet part 24 of the charging part 20 and the inlet part 22 and the outlet part 24 of the charging part 20 which are subjected to nitriding treatment. It is fixed to the 30 and the charging unit 20 and includes a guide rail portion 40 for guiding the vertical movement of the safety door portion 30, the side of the safety door portion 30 is provided with a plurality of guide rollers 34 And it characterized in that the vertical movement is guided along the guide rail portion 40, respectively.

The heating unit 10 heats the material 110 to be moved to the charging unit 20 to a set temperature. The connection part 90 and the charging part 20 are sequentially installed in the heating part 10.

The charging unit 20 may be variously modified in a technical concept in which nitriding is performed by receiving the material 110 heated by the heating unit 10. Safety doors 30 are respectively installed on the inlet part 22 and the outlet part 24 of the charging part 20 so as to be movable up and down along the guide rail part 40.

As shown in FIG. 2 to FIG. 6, the safety door part 30 is installed in at least one of the inlet part 22 and the outlet part 24 of the charging part 20, and moves in the vertical direction. It may be formed in various shapes within the technical idea of opening and closing the passage is moved. Safety door unit 30 according to an embodiment includes a base member 32, the guide roller 34, the link member 37 and the front door (38).

The base member 32 has a rectangular plate shape, and is installed in a state where it is erected behind the safety door part 30 (right side of FIG. 2). The guide roller 34 provided in front of the base member 32 (the left side in FIG. 2) is spaced apart from the first roller 35 and the first roller 35 rotatably installed in the base member 32. And a second roller 36 installed at a predetermined position.

 First rollers 35 are installed on both lower and upper sides of the base member 32, respectively. The first roller 35 is rotatably installed on the bracket provided in front of the base member 32, the second roller 36 is connected to the first roller 35 through the link member 37.

Since the link member 37 is installed connecting the first roller 35 and the second roller 36, the second roller 36 may be stably installed in front of the first roller 35. The second roller 36 is rotatably installed on both upper and lower sides of the front door 38 installed in front of the base member (32).

The front door 38 connected to the second roller 36 forms a lattice structure, and the second roller 36 installed at both sides of the front door 38 has a second guide part of the guide rail part 40. It moves up and down along 46.

Guide rail portion 40 is fixed to the charging unit 20 may be formed in a variety of shapes within the technical spirit for guiding the vertical movement of the safety door portion (30). Since a plurality of guide rollers 34 are provided on the side of the safety door part 30, and the vertical movements are guided along the guide rails 40, the pressure is applied to the base member 32 by the internal pressure of the charging part 20. Even if this is delivered, the safety door unit 30 can be prevented from being separated from the guide rail unit 40. The guide rail portion 40 according to an embodiment includes a first guide portion 44 and a second guide portion 46.

The first guide part 44 guides the vertical movement of the first roller 35 and extends in the vertical direction. In addition, the second guide part 46 is installed in front of the first guide part 44 and guides the vertical movement of the second roller 36 and extends in the vertical direction.

The first guide part 44 according to an embodiment is positioned between the first roller 35 and the second roller 36 and has a plate shape extending in the vertical direction. The cross section of the second guide portion 46 is “b” shaped and connected to the first guide portion 44. The cross section of the guide rail portion 40 to which the first guide portion 44 and the second guide portion 46 are connected is a “c” shape and has an open shape toward the side of the safety door portion 30.

The first roller 35 of the safety door part 30 is guided up and down along the side of the first guide part 44. The second roller 36 installed at a position facing the first roller 35 with the first guide 44 therebetween is guided up and down along the second guide 46.

As shown in FIG. 7 and FIG. 8, the heat treatment apparatus 1 according to the exemplary embodiment includes a nitrogen supply unit 50, a vacuum unit 60, a measurement unit 70, a connection unit 90, and a driving unit 100. It includes more. The nitrogen supply unit 50 is connected to the charging unit 20 and supplies nitrogen to the inside of the charging unit 20. The nitrogen supply unit 50 is provided with a separate control valve, it is operated by the control signal of the control unit 200.

The vacuum unit 60 is connected to the charging unit 20, and discharges the air inside the charging unit 20 to the outside of the charging unit 20. In the vacuum unit 60 according to the exemplary embodiment, a valve is installed in a vacuum pipe connected to the charging unit 20, and operated by a control signal of the controller 200. In addition, the operation of the vacuum pump connected to the vacuum pipe is controlled by the control signal of the controller 200.

The measuring unit 70 measures the pressure of the gas inside the charging unit 20 and transmits the measured value to the control unit 200. The measuring unit 70 according to an embodiment may measure a pressure when the inside of the charging unit 20 is in a vacuum state, and measures the pressure in a state where the charging unit 20 is filled with nitrogen gas. A separate instrument can be used to further improve the accuracy of the measurement. The control unit 200 receives the measured value of the measuring unit 70 and controls the operation of the nitrogen supply unit 50 and the vacuum unit 60.

The connection part 90 is connected to both sides of the heating part 10 and the charging part 20 and forms a passage through which the material 110 is moved. In addition, the insulated door part 95 is installed at the connection part 90 facing the heating part 10, moves up and down, and opens and closes the outlet of the heating part 10. The heat insulation door part 95 is installed at the side of the connection part 90 facing the heating part 10, and is moved in the vertical direction by the operation of the cylinder installed for the operation of the heat insulation door part 95.

As shown in FIGS. 8 to 10, the driving unit 100 is operated by a control signal of the control unit 200, and the rod member 105, which is linearly moved, is connected to the safety door unit 30. Move in the vertical direction. The driving unit 100 according to the exemplary embodiment is installed above the charging unit 20. The rod member 105 of the driving unit 100 installed in the vertical direction extends downward and is connected to the front door 38 of the safety door unit 30. Therefore, since the rod member 105 is moved up and down by the operation of the driving unit 100, the safety door unit 30 is moved up and down along the guide rail portion 40.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating state of the heat treatment apparatus 1 according to an embodiment of the present invention.

The material 110 heated by the heating unit 10 moves inside the charging unit 20 through the connection unit 90. In the state where the material 110 is located inside the charging unit 20, the control unit 200 operates the vacuum unit 60 to operate the nitrogen supply unit 50 after the inside of the charging unit 20 is vacuumed. . Nitrogen is supplied to the inside of the charging unit 20 by the operation of the nitrogen supply unit 50, and the internal pressure of the charging unit 20 is measured by the measuring unit 70.

When the measuring unit 70 measures that the pressure due to nitrogen charged to the charging unit 20 reaches the set range and transmits the measured value to the control unit 200, the control unit 200 opens the valve of the nitrogen supply unit 50. By blocking the additional supply of nitrogen by controlling to prevent the safety door portion 30 is separated from the guide rail portion (40).

And since the control unit 200 controls the operation of the driving unit 100, while the material 110 is a heat treatment material inside the charging unit 20, the air is continuously supplied to the driving unit 100 connected to the safety door unit 30 do. Therefore, since the rod member 105 presses the safety door part 30 downward, the safety door part 30 is prevented from being separated from the guide rail part 40 by the internal pressure of the charging part 20.

In addition, since the guide rail portion 40 is provided with a first guide portion 44 for guiding the first roller 35 and a second guide portion 46 for guiding the second roller 36, the guide rail portion 40 is provided. ) And the contact of the guide roller 34 is increased to achieve stress dispersion. Therefore, even if excessive pressure is applied to the safety door unit 30, the safety door unit 30 can be prevented from being separated from the guide rail unit 40.

As described above, according to the present invention, since the control unit 200 controls the operation of the nitrogen supply unit 50 based on the measured value of the measuring unit 70, the inner pressure of the charging unit 20 is increased above the set pressure. By preventing the departure of the safety door unit 30 to prevent the operation reliability can be improved. In addition, since the plurality of rollers provided on both sides of the safety door part 30 are guided in the vertical direction along the plurality of guide grooves provided in the guide rail part 40, the safety door part 30 is outside the charging part 20. It is possible to prevent the occurrence of safety accidents by preventing the departure.

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. will be. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

1: heat treatment apparatus 10: heating part
20: charging part 22: inlet part
24: exit portion 30: safety door portion
32: base member 34: guide roller
35: first roller 36: second roller
37: link member 38: front door
40: guide rail portion 44: the first guide portion
46: second guide 50: nitrogen supply
60: vacuum section 70: measuring section
90: connecting portion 95: insulated door
100: drive unit 105: rod member
110: material 200: control unit

Claims (7)

A heating unit for heating the material to a set temperature;
A charging unit configured to receive the material heated in the heating unit and to perform nitriding treatment;
A safety door part installed in at least one of the inlet part and the outlet part of the charging part and moving up and down; And
And a guide rail part fixed to the charging part to guide the vertical movement of the safety door part.
The side of the safety door is provided with a plurality of guide rollers, characterized in that the vertical movement is guided along the guide rail, respectively,
A nitrogen supply unit connected to the charging unit and supplying nitrogen into the charging unit;
A vacuum unit connected to the charging unit and discharging air inside the charging unit to the outside of the charging unit;
A measuring unit measuring a pressure of a gas inside the charging unit; And
A control unit which receives the measurement value of the measurement unit and controls the operation of the nitrogen supply unit and the vacuum unit; And
And a driving unit which is operated by a control signal of the controller and is connected to the safety door part to move linearly to the safety door part to move the safety door part in the vertical direction.
The safety door portion, a plate-shaped base member;
A first roller rotatably installed on the base member;
A second roller installed at a position spaced apart from the first roller;
A link member connecting the first roller and the second roller; And
And a front door connected to the second roller.
The guide rail unit may include: a first guide unit which guides the vertical movement of the first roller and extends in the vertical direction; And
And a second guide part which is installed in front of the first guide part and guides the vertical movement of the second roller and extends in the vertical direction.
The measuring unit may further include a device for measuring pressure when the inside of the charging unit is in a vacuum state, and a device for measuring pressure in a state where the charging unit is filled with nitrogen gas.
And the control unit continuously supplies air to the drive unit connected to the safety door unit while the material is inside the charging unit.
delete The method of claim 1,
A connecting part connected to both sides of the heating part and the charging part and forming a passage through which the material is moved; And
And a heat insulation door part installed at the connection part facing the heating part and moving upward and downward and opening and closing the outlet of the heating part.
delete delete The method of claim 1,
Heat treatment apparatus, characterized in that the first roller is installed on each of the lower both sides and the upper both sides of the base member.
delete

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