CN211005496U - Isothermal normalizing device with good sealing performance for machining steel forgings - Google Patents

Abstract

The utility model discloses a steel forging processing is with isothermal normalizing device that sealing performance is good, through setting gradually the oven structure of heating furnace from inside to outside into high temperature resistant wear-resisting molanchote layer, high strength high temperature resistant heavy brick layer, high strength light refractory brick layer, the withstand voltage heat preservation mix the castable layer, can effectively solve the bad problem of leakproofness of heating furnace, make the forging in the heating furnace be heated evenly, increase thermal efficiency, promote product quality; in addition, through utilizing the draught fan to blow in the box, and combine water in the liquid reserve tank is in the cooling channel inner loop to this utilizes air-cooled water-cooling's mode to realize the heat exchange, has promoted heat recovery efficiency, will follow fast the forging that the heating furnace was carried out cools off to the ideal temperature, has improved refrigerated controllability, guarantees the forging and is entering into to the temperature before the isothermal furnace is accurate, has improved the product quality after the thermal treatment with this, has improved the qualification rate of product.

Description

Isothermal normalizing device with good sealing performance for machining steel forgings

Technical Field

The utility model relates to a heat treatment device technical field especially relates to a steel forging processing is with isothermal normalizing device that sealing performance is good.

Background

Normalizing is a heat treatment process, and is mainly used for improving the problems of coarse and uneven crystal grains of carburized steel part blanks (hereinafter called forging blanks) after high-temperature forging, eliminating α -Widmannstatten structures and unstable structures (such as martensite and bainite), and providing suitable hardness and ideal structures (equiaxed eutectoid ferrite and pearlite structures) for later cutting processing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steel forging processing is with isothermal normalizing device that sealing performance is good, the quality that aims at solving the forging that isothermal normalizing device among the prior art heat-treated out is relatively poor, the lower technical problem of product percent of pass.

In order to achieve the purpose, the isothermal normalizing device with good sealing performance for processing the steel forging comprises a heating furnace, an isothermal furnace, a conveying belt, a cooling assembly and a control piece, wherein the conveying belt is arranged between the heating furnace and the isothermal furnace, the cooling assembly is arranged above the conveying belt, and a furnace wall structure of the heating furnace is sequentially provided with a high-temperature-resistant and wear-resistant mullite layer, a high-strength high-temperature-resistant heavy brick layer, a high-strength light refractory brick layer and a pressure-resistant and heat-preservation mixed castable layer from inside to outside;

the cooling component comprises a box body, a draught fan, a wind outlet pipe, a liquid storage box, a water pump, a water inlet pipe and a water outlet pipe, wherein the box body is arranged above the conveying belt, a communicated cooling channel is arranged on the side wall of the box body, the draught fan is arranged above the box body, a cold wind inlet of the draught fan is positioned at one end, far away from the box body, of the draught fan, a wind outlet on the draught fan is communicated with the box body, the wind outlet pipe is communicated with the box body, cooling liquid is contained in the liquid storage box, the water pump is arranged in the liquid storage box, one end of the water inlet pipe penetrates through the side wall of the liquid storage box and is communicated with the water pump, the other end of the water inlet pipe is communicated with a water inlet end of the cooling channel, a water outlet end of the cooling channel is communicated with, the control piece respectively with draught fan with water pump electric connection.

Wherein, cooling module still includes first temperature detect spare and heat exchange piece, first temperature detect spare is arranged in the inside of liquid reserve tank, heat exchange piece sets up the outlet pipe with the junction of liquid reserve tank, just heat exchange piece with first temperature detect spare respectively with control electric connection.

The cooling assembly further comprises a hot air circulating pipe, one end of the hot air circulating pipe is communicated with the box body, and the other end of the hot air circulating pipe is communicated with a hot air inlet of the draught fan.

Wherein, cooling module still includes second temperature detection spare, second temperature detection spare sets up the air outlet of draught fan, just second temperature detection spare with control electric connection.

Wherein, cooling module still includes air regulation valve, air regulation valve's quantity is two, two air regulation valve sets up respectively the cold wind air intake department of draught fan with the hot-blast air intake department of draught fan, and two air regulation valve respectively with control electric connection.

The isothermal furnace comprises a furnace body and a heating element, wherein the heating element is arranged in the furnace body, and the heating element is electrically connected with the control element.

The isothermal furnace further comprises a suction fan, the suction fan is fixedly connected with the furnace body, and the suction fan is located above the furnace body.

The isothermal furnace further comprises two third temperature detection pieces, the number of the third temperature detection pieces is two, the two third temperature detection pieces are fixedly connected with the furnace body respectively and are located on two side walls of the furnace body respectively, and the two third temperature detection pieces are electrically connected with the control piece respectively.

The isothermal furnace further comprises a stirring piece, the stirring piece is rotatably connected with the furnace body and is positioned at the bottom of the furnace body, and the stirring piece is electrically connected with the control piece.

The beneficial effects of the utility model are embodied in: the problem of poor sealing performance of the heating furnace can be effectively solved by sequentially arranging a furnace wall structure of the heating furnace from inside to outside as a high-temperature-resistant wear-resistant Molanchoe layer, a high-strength high-temperature-resistant heavy brick layer, a high-strength light refractory brick layer and a pressure-resistant heat-preservation mixed castable layer, so that a forge piece in the heating furnace is uniformly heated, the thermal efficiency is increased, and the product quality is improved; in addition, through utilizing the draught fan to blow in the box, and combine water in the liquid reserve tank is in cooling channel inner loop to this utilizes air-cooled water cooling's mode to realize the heat exchange, has promoted heat recovery efficiency, will follow fast the forging that the heating furnace carried out cools off to the ideal temperature, has improved refrigerated controllability, guarantees the forging and is entering into to temperature before the isothermal furnace is accurate, has guaranteed that transformation product pearlite and ferrite are thinner and even, hardness distribution is even, has improved the product quality after thermal treatment with this, has improved the qualification rate of product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the isothermal normalizing device with good sealing performance for processing the steel forging of the utility model.

FIG. 2 is a cross-sectional view of a wall of a heating furnace according to the present invention.

100-isothermal normalizing device with good sealing performance for processing steel forgings, 10-heating furnace, 11-high temperature resistant and wear resistant Molan stone layer, 12-high strength and high temperature resistant heavy brick layer, 13-high strength light refractory brick layer, 14-pressure resistant and heat preservation mixed castable layer, 20-isothermal furnace, 21-furnace body, 22-heating element, 23-suction fan, 24-third temperature detection element, 25-stirring element, 30-conveying belt, 40-cooling component, 41-box body, 411-cooling channel, 42-induced draft fan, 43-air outlet pipe, 44-liquid storage tank, 45-water pump, 46-water inlet pipe, 47-water outlet pipe, 48-first temperature detection element, 49-heat exchange element, 491-hot air circulating pipe, 492-second temperature detection element, 493 air volume regulating valve, 50 control part.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 and 2, the utility model provides an isothermal normalizing device 100 with good sealing performance for processing steel forgings, which comprises a heating furnace 10, an isothermal furnace 20, a conveyer belt 30, a cooling assembly 40 and a control element 50, wherein the conveyer belt 30 is arranged between the heating furnace 10 and the isothermal furnace 20, the cooling assembly 40 is arranged above the conveyer belt 30, and the furnace wall structure of the heating furnace 10 is sequentially provided with a high-temperature-resistant wear-resistant mullite layer 11, a high-strength high-temperature-resistant heavy brick layer 12, a high-strength light-weight refractory brick layer 13 and a pressure-resistant heat-preserving mixed castable layer 14 from inside to outside;

cooling module 40 includes box 41, draught fan 42, play tuber pipe 43, liquid reserve tank 44, water pump 45, inlet tube 46 and outlet pipe 47, box 41 sets up the top of conveyer belt 30, the cooling channel 411 of intercommunication has on the lateral wall of box 41, draught fan 42 arranges in the top of box 41, just draught fan 42's cold wind intake is located draught fan 42 keeps away from the one end of box 41, air outlet on the draught fan 42 with box 41 intercommunication, go out tuber pipe 43 with box 41 intercommunication, hold the coolant liquid in the liquid reserve tank 44, water pump 45 arranges in the liquid reserve tank 44, the one end of inlet tube 46 runs through the lateral wall of liquid reserve tank 44, and with water pump 45 intercommunication, the other end of inlet tube 46 with the end intercommunication of intaking of cooling channel 411, the end of cooling channel 411 with the one end intercommunication of outlet pipe 47, the other end of outlet pipe 47 with the liquid reserve tank 44 intercommunication, control 50 respectively with draught fan 42 with water pump 45 electric connection.

In the present embodiment, the heating furnace 10 is used to heat a forged part to a predetermined temperature, the conveyor 30 transports the workpiece in the heating furnace 10 to the isothermal furnace 20, and the cooling unit 40 cools the workpiece transported from the heating furnace 10 to a desired temperature range during transportation, and then transports the workpiece to the isothermal furnace 20. The control piece 50 is a single chip microcomputer, the high-temperature-resistant wear-resistant mullite layer 11, the high-strength high-temperature-resistant heavy brick layer 12, the high-strength light refractory brick layer 13 and the pressure-resistant heat-preservation mixed castable layer 14 are sequentially arranged on the wall structure of the heating furnace 10 from inside to outside, so that the problem of poor sealing property of the heating furnace 10 can be effectively solved, the forge pieces in the heating furnace 10 are uniformly heated, the thermal efficiency is increased, and the product quality is improved; when the work piece that heating furnace 10 carried out transports to in the box 41, control 50 control draught fan 42 with the action of water pump 45, draught fan 42 inhales cold wind through the cold wind air intake, the process the air outlet of draught fan 42 insufflates cold wind to in the box 41, thereby the cooling forging, simultaneously water pump 45 extracts the water in the liquid reserve tank 44, and the process inlet tube 46 flows in to in the cooling channel 411, then the rivers are through outlet pipe 47, get back to in the liquid reserve tank 44, then pass through the water pump 45 extraction, with this circulation of reciprocating, reduce the temperature in the box 41 to the cooling forging, through utilizing draught fan 42 to blow to in the box 41, and combine water in the liquid reserve tank 44 is in the cooling channel 411 inner loop, utilize the cold and hot mode of the cold-hot transmission of air cooling water to realize the heat exchange, the heat recovery efficiency is improved, the forged piece conveyed out of the heating furnace 10 is rapidly cooled to the desired temperature, the cooling controllability is improved, the temperature of the forged piece before entering the isothermal furnace 20 is accurate, the transformed products pearlite and ferrite are ensured to be fine and uniform, the hardness distribution is uniform, the product quality after heat treatment is improved, and the product qualification rate is improved.

Further, the cooling assembly 40 further includes a first temperature detecting element 48 and a heat exchanging element 49, the first temperature detecting element 48 is disposed inside the liquid storage tank 44, the heat exchanging element 49 is disposed at a connection position of the water outlet pipe 47 and the liquid storage tank 44, and the heat exchanging element 49 and the first temperature detecting element 48 are respectively electrically connected to the control element 50.

In the present embodiment, wherein the heat exchanging element 49 is a heat exchanger, and the first temperature detecting element 48 is a temperature sensor, since the temperature of the cooling liquid is greatly increased after the cooling channel 411 is heat exchanged, the heat exchanging efficiency with the tank 41 is affected if the cooling liquid enters the cooling channel 411 after entering the liquid storage tank 44 and then enters the cooling channel 411 without reducing the temperature of the cooling liquid. Therefore, through the heat exchanging element 49 and the first temperature detecting element 48, when the first temperature detecting element 48 detects that the temperature of the cooling liquid is too high, the signal is transmitted to the control element 50, the control element 50 controls the action of the heat exchanging element 49, so that the cooling liquid can exchange heat with the heat exchanging element 49 to reduce the temperature of the cooling liquid, and when the temperature is reduced to be below the preset temperature, the control element 50 controls the heat exchanging element to stop acting, so as to increase the cooling rate of the forging.

Further, the cooling module 40 further includes a hot air circulating pipe 491, one end of the hot air circulating pipe 491 is communicated with the box body 41, and the other end of the hot air circulating pipe 491 is communicated with a hot air inlet of the induced draft fan 42.

In this embodiment, because different workpieces have different cooling requirements, wherein for small workpieces, the cooling speed of the small workpieces is too fast to cause too low temperature and affect the product quality, when the induced draft fan 42 blows cold air onto the hot workpieces in the box body 41, the cold air cools the hot workpieces to become hot air, by providing the hot air circulating pipe 491, a part of the hot air in the box body 41 can be circulated to the hot air inlet of the induced draft fan 42 by using the hot air circulating pipe 491, and then conveyed from the hot air inlet to the box body 41 through the air outlet of the induced draft fan 42, while the other part of the hot air is discharged from the air outlet pipe 43, so that the hot air generated in the cooling process can be effectively utilized, and the cold air entering from the cold air inlet is combined to cool the workpieces in the cooling chamber, and after the hot air and the cold air are mixed, the cooling air directly blown to the workpiece is not too cold, so that the unqualified product caused by the excessively high cooling speed of the small workpiece is avoided.

Further, the cooling assembly 40 further includes a second temperature detector 492, the second temperature detector 492 is disposed at an air outlet of the induced draft fan 42, and the second temperature detector 492 is electrically connected to the control element 50. Cooling module 40 still includes air regulation valve 493, air regulation valve 493's quantity is two, two air regulation valve 493 sets up respectively draught fan 42's cold air intake department with draught fan 42's hot-blast air intake department, and two air regulation valve 493 respectively with control 50 electric connection.

In this embodiment, the second temperature detector 492 is disposed at the air outlet of the induced draft fan 42, and the second temperature detector 492 is a temperature sensor and can be used to detect the temperature of the air coming out from the air outlet of the induced draft fan 42, so that an operator can determine whether the current temperature of the cooling air is consistent with the type of the workpiece to be cooled and the process requirement, and thus determine whether the mixing ratio of the cold air and the hot air needs to be adjusted. In the actual process, the second temperature detecting element 492 feeds the actual temperature of the air outlet of the induced draft fan 42 back to the control element 50, and the control element 50 automatically determines whether the temperature of the air outlet of the induced draft fan 42 meets the requirement, so that the air volume adjusting valves 493 are adjusted to correspondingly adjust the air volume of cold air and hot air, if the determination result is that the temperature of the air outlet is too low, the control element 50 sends an instruction to the two air volume adjusting valves 493 to adjust the opening angle, and the temperature of the cooling air blown into the box 41 is adjusted to be within a preset temperature range by reducing the air volume of the cold air or increasing the air volume of the hot air; if the temperature of the air outlet is too high, the control element 50 sends an instruction to the two air volume adjusting valves 493 to adjust the opening angle, and the temperature of the cooling air blown into the box body 41 is adjusted to be within a preset temperature range by increasing the air intake of the cold air or reducing the air intake of the hot air, so that the quality of the manufactured forged piece is improved, and the product yield is improved.

Further, the isothermal furnace 20 comprises a furnace body 21 and a heating element 22, wherein the heating element 22 is arranged inside the furnace body 21, and the heating element 22 is electrically connected with the control element 50. The isothermal furnace 20 further comprises a suction fan 23, the suction fan 23 is fixedly connected with the furnace body 21, and the suction fan 23 is located above the furnace body 21. The isothermal furnace 20 further comprises two third temperature detection pieces 24, the number of the third temperature detection pieces 24 is two, the two third temperature detection pieces 24 are respectively and fixedly connected with the furnace body 21 and respectively located on two side walls of the furnace body 21, and the two third temperature detection pieces 24 are respectively and electrically connected with the control piece 50.

In the embodiment, after the forging workpiece is cooled to a proper temperature, isothermal tempering is performed in the isothermal furnace 20 to improve the performance, the forging workpiece is placed in the furnace body 21, then the control element 50 controls the heating element 22 to heat the forging, isothermal tempering is performed, during operation, the temperature range is set by the control element in advance, the proper quenching temperature is 230-450 ℃, the quenching temperature is lower than 230 ℃, a martensite structure is easily formed, the hardness is high, the brittleness is high, and the toughness is extremely low; and the steel is easy to be transformed into ferrite and pearlite structures at the temperature higher than 450 ℃, so that the aim of improving the performance by isothermal quenching can not be achieved; the third temperature detection part 24, namely the temperature sensor, is used for real-time reaction of the temperature in the furnace body 21 to the control part 50, when the real-time temperature is lower than 230 ℃, the control part 50 controls the heating part 22 to drive the interior of the furnace body 21 to be heated, so that the temperature in the furnace body 21 reaches more than 230 ℃, and when the real-time temperature is higher than 450 ℃ or is about to reach 450 ℃, the control part 50 controls the suction fan 23 to be started, so as to cool the furnace body 21 until the temperature in the furnace body 21 is kept within the preset temperature range of 230-450 ℃. Through the two third temperature detecting elements 24 arranged on the two side walls of the furnace body 21, it can be known in real time whether the temperatures of the furnace body 21 at different positions are the same, and at the same time, it is also possible to more flexibly make corresponding reactions with respect to signals transmitted by the third temperature sensing elements at different positions, specifically, one of the temperature detecting elements is connected with the control element 50, the control element 50 is connected with the heating element 22 arranged near one of the temperature detecting elements, and when the temperature displayed by the third temperature detecting element 24 is lower than 230 ℃, the control element 50 controls the heating element 22 to heat.

Further, the isothermal furnace 20 further comprises a stirring member 25, the stirring member 25 is rotatably connected with the furnace body 21 and is located at the bottom of the furnace body 21, and the stirring member 25 is electrically connected with the control member 50.

In this embodiment, stirring 25 is the flabellum, so that guarantee furnace body 21 each position can both obtain the stirring and make heat energy dispersion even, stirring 25 pass through the motor with control 50 is connected, works as two reach between the third temperature sensing piece when control 50's temperature difference is greater than preset's rated difference 15 ℃, control 50 control stirring 25 starts, can make the even process of heat energy intelligent like this to this makes the forging work piece be heated more evenly, is favorable to guaranteeing work piece quality, promotes the work piece qualification rate.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims (9)

1. An isothermal normalizing device with good sealing performance for processing a steel forging piece is characterized in that,

the furnace wall structure of the heating furnace is sequentially provided with a high-temperature-resistant wear-resistant Molanchoe layer, a high-strength high-temperature-resistant heavy brick layer, a high-strength light refractory brick layer and a pressure-resistant heat-preservation mixed castable layer from inside to outside;

the cooling component comprises a box body, a draught fan, a wind outlet pipe, a liquid storage box, a water pump, a water inlet pipe and a water outlet pipe, wherein the box body is arranged above the conveying belt, a communicated cooling channel is arranged on the side wall of the box body, the draught fan is arranged above the box body, a cold wind inlet of the draught fan is positioned at one end, far away from the box body, of the draught fan, a wind outlet on the draught fan is communicated with the box body, the wind outlet pipe is communicated with the box body, cooling liquid is contained in the liquid storage box, the water pump is arranged in the liquid storage box, one end of the water inlet pipe penetrates through the side wall of the liquid storage box and is communicated with the water pump, the other end of the water inlet pipe is communicated with a water inlet end of the cooling channel, a water outlet end of the cooling channel is communicated with, the control piece respectively with draught fan with water pump electric connection.

2. The isothermal normalizing device with good sealing performance for processing the steel forging according to claim 1, wherein,

the cooling module still includes first temperature detect spare and heat exchange piece, first temperature detect spare is arranged in the inside of liquid reserve tank, heat exchange piece sets up the outlet pipe with the junction of liquid reserve tank, just heat exchange piece with first temperature detect spare respectively with control electric connection.

3. The isothermal normalizing device with good sealing performance for processing the steel forging according to claim 1, wherein,

the cooling assembly further comprises a hot air circulating pipe, one end of the hot air circulating pipe is communicated with the box body, and the other end of the hot air circulating pipe is communicated with a hot air inlet of the draught fan.

4. The isothermal normalizing device with good sealing performance for processing the steel forging according to claim 3, wherein,

the cooling module still includes the second temperature detection spare, the second temperature detection spare sets up the air outlet of draught fan, just the second temperature detection spare with control electric connection.

5. The isothermal normalizing device with good sealing performance for processing the steel forging according to claim 4, wherein,

the cooling module still includes air regulation valve, air regulation valve's quantity is two, two air regulation valve sets up respectively the cold air intake department of draught fan with the hot-blast air intake department of draught fan, and two air regulation valve respectively with control electric connection.

6. The isothermal normalizing device with good sealing performance for processing the steel forging according to claim 1, wherein,

the isothermal furnace comprises a furnace body and a heating element, wherein the heating element is arranged in the furnace body, and the heating element is electrically connected with the control element.

7. The isothermal normalizing device with good sealing performance for processing the steel forging according to claim 6, wherein,

the isothermal furnace also comprises a suction fan, wherein the suction fan is fixedly connected with the furnace body, and the suction fan is positioned above the furnace body.

8. The isothermal normalizing device with good sealing performance for processing the steel forging according to claim 7,

the isothermal furnace also comprises two third temperature detection pieces, the number of the third temperature detection pieces is two, the two third temperature detection pieces are respectively and fixedly connected with the furnace body and are respectively positioned on two side walls of the furnace body, and the two third temperature detection pieces are respectively and electrically connected with the control piece.

9. The isothermal normalizing device with good sealing performance for processing the steel forging according to claim 8,

the isothermal furnace further comprises a stirring piece, the stirring piece is rotatably connected with the furnace body and is positioned at the bottom of the furnace body, and the stirring piece is electrically connected with the control piece.

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