• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to an adjustable temperature furnace dedicated to the heat treatment of modular forged steel pistons with energy saving and emission reduction effects, as well as a heat treatment process. The inlet for the thermal return pipe is mounted on the top of the blast chiller. The outlet of the heat return pipe is mounted upstream of the cooling section of the heat treatment device. The side part of the blast chiller is located below the conveyor belt, is equipped with a cold air inlet. The cold air fan is mounted next to the blast cooler. The cold air fan inlet is directed to the outside. The air outlet is connected to the cold air inlet of the blast cooler using a hose. The invention is based on a novel heat treatment process.
    公开号:BE1027328A9
    申请号:E20205162
    申请日:2020-03-09
    公开日:2021-01-18
    发明作者:Hao Xu；Jiang Liu；Yifei Xu；Mengtang Xu
    申请人:Chongqing Vocational Inst Eng；
    IPC主号:
    专利说明:

    Adjustable temperature furnace dedicated to the heat treatment of modular forged steel pistons with energy saving and emission reduction effects, and heat treatment process Technical Field The invention belongs to the technical field of heat treatment of modular forged steel pistons. More particularly, the invention belongs to the field of the adjustable temperature furnace dedicated to the heat treatment of modular forged steel pistons with energy saving and emission reduction effects, and to the field of the heat treatment process.
    State of the art As regards obtaining the high compression ratio in the engine, improving combustion efficiency, reducing exhaust gas emissions, improving service life, etc., the piston modular forged steel outperforms the traditional aluminum alloy die-cast piston. Compared with traditional aluminum alloy die-casting piston, said piston is characterized by high mechanical strength (for example, the tensile strength of 42CrMo steel will exceed 1080Mpa, while the tensile strength of the forged aluminum alloy is only 133-437 Mpa), excellent mechanical performance at high strength, excellent antiabrasive performance at high temperature, small coefficient of thermal expansion (about one half of that of aluminum alloy in order to achieve the lower designed clearance between piston and cylinder and the ratio of oil to fuel oil from 0.05% to 0.12%), significantly improve the combustion efficiency of the engine and lifespan (greater than or equal to 1.20 million km), to save energy and reduce emissions. The modular forged steel piston is mainly dedicated to the new reinforced motor which has the motor propulsion over 20Mpa, and the mounted power over 32KW / L. Compared with the ordinary engine, it is able to improve power by 20% -30%, reduce oil consumption by 5% -10%, decrease CO emissions: by 10% -20%, apply to military vehicles, heavy trucks, work vehicles, racing vehicles, etc. It is a replaceable and upgradeable new engine piston with high power and low emission. The process for making a modular forged steel piston is relatively complex. Among them, the forged steel modular piston heat treatment line is an important machining line. To meet the requirements on internal structure, particle size and mechanical strength, it is necessary to go through processes such as rapid cooling, heat preservation, cooling, etc. for pre-treated parts of the modular forged steel piston. At the same time, temperature control is very important during heat treatment of pre-treated modular forged steel parts. Existing engineering materials adopt hardened and tempered 42CrMo4A steel. The heat treatment process adopts waste heat quenching and high temperature tempering. It often has the quench crack or non-conforming Brinell hardness. There are not only serious quality and safety risks, but also serious energy consumption. When a large amount of heat is exhausted outside, the environment is polluted causing prohibitive production costs.
    Therefore, during actual production, there are technical difficulties. If there is a need to improve the hardness and conformance rate of pre-treated modular forged steel parts, an excellent heat treatment process should be adopted. Despite the proposal of an excellent heat treatment process, it is thus necessary to develop temperature control equipment dedicated to materializing said process which is required to obtain the excellent energy saving and emission reduction effects, and meet the needs of real production applications.
    Therefore, an urgent technical problem is to study an adjustable temperature furnace dedicated to the heat treatment of pre-treated modular forged steel parts with excellent energy saving and emission reduction effects.
    Disclosure of the Invention The object of the invention is to solve problems which have arisen during the heat treatment of modular forged steel parts in the prior arts, such as the waste of thermal energy,
    the great difficulty of temperature control, unstable internal quality in the forged steel modular piston produced, etc., and to provide an adjustable temperature furnace dedicated to heat treatment of the forged steel modular piston with energy saving effects and reduction of emissions, and a heat treatment process dedicated to solving the aforementioned problems.
    In order to achieve the aforementioned objects, the technical solutions of the invention are as follows: An adjustable temperature furnace dedicated to the heat treatment of modular forged steel pistons with energy saving and emission reduction effects, comprising a control device. distribution, a rapid cooler and a heat treatment device; said heat treatment device comprising a conveyor belt; the feed opening of said dispensing device located above the conveyor belt of the blast chiller; the chute end of the blast cooler conveyor belt located above the heat treatment conveyor belt; it further comprising a thermal return pipe; said heat treatment conveyor belt dividing back and forth a first temperature control section, a second temperature control section, a third temperature control section and a cooling section; the inlet of said thermal return pipe being mounted above the blast cooler; the outlet of said heat return pipe being mounted above the cooling section of the heat treatment device; the side part of the blast cooler located below the conveyor belt, being equipped with a cold air inlet; the cold air fan being mounted next to the blast cooler; the inlet of the cold air fan to the outside; the air outlet being connected to the cold air inlet of the blast chiller using a hose.
    A plurality of first grooves being provided in the first temperature control section in said heat treatment conveyor belt; a plurality of second grooves being provided in the second temperature control section; a plurality of third grooves being provided in the third temperature control section; an unequal amount of the electric radiating tubes being fitted in the first groove, the second groove and the third groove.
    The quantity of the electric radiating tube in said first groove is greater than the quantity of the electric radiating tube in the second groove.
    Said heat treatment device is at the top of the first temperature control section, the second temperature control section and the third temperature control section, is equipped with a homogeneous air fan with spherical blades.
    The heat insulating layer is provided on the inner wall of said heat return pipe and at the top inside the heat treatment device.
    The mesh conveyor belt of said heat treatment conveyor belt is a herringbone woven belt.
    A Y-shaped discharge port is mounted in the discharge location of said heat treatment conveyor belt.
    An oxide scale recovery port is mounted at the bottom of said blast cooler.
    A honeycomb panel being mounted in said blast cooler; said panel being above the conveyor belt; said panel being of heat resistant and high temperature stainless steel.
    A heat treatment process for the furnace comprising the following steps: The pretreated parts of the modular forged steel piston being rapidly cooled on the blast chiller, the temperature of which being reduced to 720 degrees from 1050 degrees; The pretreated parts of the 0.5 hour heat-preserving forged steel modular piston on the first temperature control section of the heat treatment device, the temperature of which being reduced to 420 degrees from 720 degrees; The pretreated parts of the modular forged steel piston being slowly cooled on the second temperature control section of the heat treatment device; The pretreated parts of the 0.2 hour heat-preserving forged steel modular piston on the third temperature control section of the heat treatment device, the temperature of which being reduced to 200 degrees from 420 degrees; The pretreated parts of the modular forged steel piston are air-cooled after exiting from the heat treatment device. Beneficial Effect The invention relates to an adjustable temperature furnace dedicated to the heat treatment of modular forged steel pistons with energy saving and emission reduction effects as well as a heat treatment process. Compared with the prior arts, the new heat treatment processes, it is able to not only meet customer's requirements on the metallographic structure inside the forged steel modular piston and on the particle size, improve the compliance rate and also to achieve energy saving and emission reduction effects.
    In the invention, the pre-treated parts of the forged steel modular piston adopts a new heat treatment process, skillfully transmits the waste heat from rapid cooling into heat treatment operations to improve not only the poor production environment of used when exhausting waste heat generated by rapid cooling to the outside, but also avoid wasting waste heat from cooling, and save energy. At the same time, the design of multiple temperature control sections can meet the needs of different temperature gradients in the temperature control chains of the pre-treated parts of the forged steel modular piston and the heat treatment process needs of the modular piston forged steel.
    The average temperature of the oven according to the invention is good: the heating is carried out at the bottom. At the same time, it adopts heat-resistant and high-temperature resistant stainless honeycomb air guide panel as well as heat-resistant steel WGBG spherical blade homogeneous air fan to significantly improve the average oven temperature. . There is no room heating dead point. The oven is characterized by an average temperature of +/- 5 ° C, control precision +/- 1 ° C and low energy consumption. The heat resistant layer of the oven is present at the top and on both sides of the oven. The fire-resistant brick layer is provided at the bottom. The windproof soft curtain is provided in the entrance and exit, is characterized by the good thermal insulation effect, low energy accumulation and low thermal loss, as well as easy automatic production of equipments: it is able to automatically control the temperature and action, and prepare perfect alarm devices and locking protection.
    Brief Description of the Figures Figure 1 shows a structural diagram of the present invention.
    Figure 2 shows the structural diagram of the AA direction for figure 1. Figure 3 shows the structural diagram of the BB direction for figure 1. Figure 4 shows the structural diagram of the CC direction for figure 1. Figure 5 shows the process diagram of the heat treatment according to the invention.
    Among them, 1- distribution system; 2- rapid cooler; 3-heat treatment device; 4-conveyor belt heat treatment; 5-thermal return pipe; 6-conveyor belt; 7-cold air inlet; 8-cold air fan; 9-homogeneous air fan with spherical blades; 10-layer heat insulating; 11-first groove; 12-second groove; 13-third groove; 14- electric radiation tube; 16- orifice for collecting oxide scale; 17- homogeneous air honeycomb panel.
    Detailed Description In order to know and better understand the structural characteristics and efficiencies obtained from the invention, the optimal embodiments and the accompanying figures are combined to achieve the detailed description.
    The description of which is as follows: Referring to Figures 1, 2, 3 and 4, the invention relates to an adjustable temperature furnace dedicated to the heat treatment of modular forged steel pistons with energy saving and emissions reduction effects, comprising a distribution device 1, a rapid cooler 2 and a heat treatment device 3. Said distribution device 1 is a traditional conveyor component.
    The feed opening of said dispensing device 1 is located above the conveyor belt 6 of the blast chiller 2. Using the dispensing device 1, the pre-treated parts of forged steel modular piston transferred from the process. previous are slid into the rapid cooler 2 using a damping chain passing over a sliding passage. The conveyor belt 6 of the blast chiller 2 is a 22x26 grid belt. The blast cooler 2 includes a flexible windproof curtain and a thermal return air hood. An oxide scale recovery 16 is mounted at the bottom of the blast cooler 2 to collect scale that has fallen during rapid cooling of the recovered components. The chute end of the conveyor belt of the blast cooler 2 is above the heat treatment conveyor belt 4. The blast chiller 2 conveys the pre-treated parts of the forged steel modular piston after the rapid cooling in the conveyor belt of heat treatment 4 to accept heat treatment. The heat treatment device 3 is dedicated to setting up the heat treatment process, comprises the heat treatment conveyor belt 4. Said heat treatment conveyor belt 4 is a traditional heating conveyor belt system. In the prior art, the heat treating conveyor belt 4 is equipped with a corresponding electrically heated fuse mounting platform. In the invention, to combine the new heat treatment method, the electric fuse mounting platform initially mounted in the heat treatment conveyor belt 4 is designed as the plurity of first groove 11, second groove 12 and third. groove 13. After regulating the groove size and the amount of the electric radiating tube 14 in the groove, it is able to realize the design by combining a new heat treatment process.
    The side part of the blast cooler 2 is located below the conveyor belt 6, is equipped with a cold air inlet 7. The cold air fan 8 is mounted next to the blast cooler 2. The inlet of the cold air fan 8 goes to the outside. The air outlet is connected to the cold air inlet 7 of the blast cooler 2 using a hose.
    The heat return pipe 5 plays two roles: one is to transmit the waste heat in the blast chiller 2 to the heat treatment device 3 to realize the waste heat recycling. As the heat treatment process will go through the repetitive steps such as rapid cooling, heat preservation, slow cooling, heat preservation, etc. Due to the loss and waste of a large amount of heat,
    In order to control the temperature of all temperature control sections, the electric radiating tube 14 will be replaced by the traditional electric fuse.
    The energy consumption concerned by the electric radiation tube 14 will be greater.
    To save energy, the thermal return pipe 5 will recycle the residual heat.
    The other is to use the thermal return pipe 5 to achieve the controllable guiding of heat outward to the backward process component as the on-site environment is very bad due to high exhaust. amount of heat to the outside upon rapid cooling of the component in order to significantly reduce the influence of exhaust heat to the outside on the operating environment.
    Therefore, the skillful design of the thermal return pipe 5 is dedicated to improving the operating environment and avoiding the problems of excessive energy consumption brought about by the use of the electric radiating tube 14 when controlling the temperature. temperature.
    The inlet of the heat return pipe 5 is mounted on the top of the blast chiller 2, while the outlet of the heat return pipe 5 is mounted on the top of the cooling section of the heat treatment device 3. The heat supplied to the parts The pre-treated modular forged steel piston in the blast cooler 2 is quickly absorbed into the heat return pipe 5. The workpiece enters an urgent cooling state.
    To meet the requirements on the metallographic structure inside the forged steel modular piston and the grain size of the forged steel modular piston, the temperature of the forged steel module should first be reduced to 720 degrees from of 1050 degrees to realize the rapid cooling and make the metallographic organization in the forged steel modular piston have the temporary stay in the austenic zone and thus get the finer grain size of inner metallography, and then to realize the slow cooling after the temperature arrival of 720 degrees to achieve the gradual segregation of the pearl bodies in the inner metallographic structure and worsen the distance between the pearl body sheets, achieve the relative internal hardness graduation unform and thus ensure the best cutting and cutting performance. machining; and then achieve slow cooling to 420 degrees and preserve heat up to 200 degrees in order to avoid segregation of the body. Metallographic bath. In this way, the temperature control process can not only meet the strict technical requirements of the modular forged steel piston, but also save energy, reduce pollution and improve production efficiency. Here, referring to figure 5, a heat treatment process is provided at the adjustable temperature dedicated to the heat treatment of modular forged steel pistons with energy saving and emission reduction effects, includes the following steps: First step , the pretreated parts of the forged steel modular piston are quickly cooled on the blast cooler 2, the temperature of which is reduced to 720 degrees from 1050 degrees; Second step, the pre-treated parts of the forged steel modular piston preserve heat for 0.5 hour on the first temperature control section of the heat treatment device 3, the temperature of which being reduced to 420 degrees from 720 degrees ; Third step, the pretreated parts of the modular forged steel piston are slowly cooled on the second temperature control section of the heat treatment device 3; Fourth step, the pre-treated parts of the forged steel modular piston preserve heat for 0.2 hours on the third temperature control section of the heat treatment device 3, the temperature of which being reduced to 200 degrees from 420 degrees ; Fifth step, the pre-treated parts of the modular forged steel piston being air-cooled after exiting from the heat treatment device 3.
    To meet the specific heat treatment needs of the modular forged steel piston, combine the heat treatment process and thus form the processes such as rapid cooling, heat preservation, slow cooling, heat preservation, air cooling , according to the process needs, the heat treatment conveyor belt 4 divides back and forth a first temperature control section, a second temperature control section, a third temperature control section and a cooling section for meet the needs of temperature control in the different temperature sections in the heat treatment process. A plurality of first grooves 11 are provided in the first temperature control section in the heat treatment conveyor belt 4. A plurality of second grooves 12 are provided in the second temperature control section.
    A plurality of third grooves 13 are provided in the third temperature control section.
    Electric radiating tubes 14 are mounted in the first groove 11, the second groove 12 and the third groove 13. The gap design in the traditional heat treatment conveyor belt 4 is provided is provided in the first groove 11, the second one. groove 12 and the third groove 13 for placing electric radiating tubes 14. The quantity of the electric radiating tube 14 in the first groove 11 is greater than the quantity of the electric radiating tube 14 in the second groove 12. With de 14 different quantity electric radiating tube, it is able to divide the different temperature zone to present the general temperature of the oven with adjustable temperature, and play the role of temperature regulation and control.
    The heat treatment device 3 is on the top of the first temperature control section, the second temperature control section and the third temperature control section, is equipped with a homogeneous air fan with spherical blades 9 The WGBG spherical blade homogeneous air fan is controlled by the frequency converter.
    The agitator blade fan on all temperature control sections will ensure sufficient and even temperature of the oven in all temperature control sections, the volume of which is regulated by the motor speed regulation.
    A heat-insulating layer 10 is provided on the inner wall of the heat return pipe 5 and on the inside of the heat treatment device 3 to further enhance the energy saving effects.
    The heat treatment mesh conveyor belt 4 is a herringbone woven belt.
    The output of the heat treatment conveyor belt 4 is equipped with a Y feed outlet.
    The Y-outlet is respectively slid smoothly from the outputs To and B for the output components by means of intermediate swing bar, adopts staggered arrangement to avoid accumulation and shock of components in one straight line.
    At the same time, the blast chiller 2 is equipped with a uniform air cell panel 17.
    Said panel 17 is located above the conveyor belt.
    Said panel 17 is made of stainless steel resistant to heat and high temperature.
    In practical use, the pre-treated part of the modular forged steel piston is passed into the blast chiller 2 from the distribution device 1 through the conveyor belt 6. The cold air extracted from the outside through the cold air fan 8 is transmitted to the bottom of the blast cooler 2. Referring to Fig. 2, a cold air flow direction from bottom to top is thus formed to achieve the rapid cooling of the pre-treated modular piston parts by forged steel up to 720 degrees from 1050 degrees.
    After passing over the pre-treated forged steel modular piston parts, the cold air is formed into hot air to pass into the cooling section of the heat treatment conveyor belt 4 through the heat return pipe 5 and then pass into the first temperature control section, the second temperature control section and the third temperature control section after switching to the cooling section to reduce the power consumption of the electric radiation tube.
    After cooling cooled, pre-treated forged steel modular piston peaks, air passes to the first temperature control section of the heat treatment conveyor belt 4 after heat preservation, and then passes to the second control section temperature of the heat treatment conveyor belt 4 to realize the slow cooling (of which the amount of the electric radiating tube 14 in the first groove 11 is greater than the quantity of the electric radiating tube 14 in the second groove 12), realizes the heat preservation in the third temperature control section of the heat treatment conveyor belt 4 to finally transmit into the cooling section of the heat treatment conveyor belt 4 to realize the air cooling.
    To combine the characteristics of the metallographic structure inside the forged steel modular piston and on the grain size, heat treatment processes such as rapid cooling, heat preservation, slow cooling, heat preservation, cooling air are thus adopted to realize the different temperature zone division of the present process equipment.
    Based on such a design of the electric radiation tube, the different gap zone is combined to realize the different temperature zone division.
    However, due to too large power consumption of the electric radiating tube, based only on the heating and heat preservation of the electric radiating tube, the cost of the forged steel modular piston is too high and will not be achievable in the real practices (this is only pure technical theory). As a result, the service environment is also optimized by skillfully designing the thermal return pipe 5 by combining the PID to reduce the power consumption of the electric radiating tube.
    By combining several methods such as electric radiating tube 5, heat treatment conveyor belt groove area 4, electric radiating tube 14, it is able to achieve the optimum mechanical design philosophies using lowest cost and most reliable component.
    The main principles, main features and advantages of the invention are displayed and described in the aforementioned text.
    Those skilled in the art will understand that the present invention is not limited to the exemplary embodiments illustrated.
    The aforementioned exemplary embodiments and the description only describe the principles of the present invention.
    The invention will show all the changes and improvements which come within the scope of the claimed invention.
    The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.
    权利要求:
    Claims (1)
    [1]
    CLAIMS BE2020 / 5162 1 Adjustable temperature furnace dedicated to the heat treatment of modular forged steel pistons with energy saving and emissions reduction effects, comprising a distribution device (1), a rapid cooler (2) and a control device. heat treatment (3); said heat treatment device (3) comprising a conveyor belt (4); the feed opening of said distribution device (1) located above the conveyor belt (6) of the blast cooler (2); the chute end of the conveyor belt (6) of the blast cooler (2) lying above the heat treatment conveyor belt (4), characterized by: it further comprising a heat return pipe (5); said heat treatment conveyor belt (4) dividing front to back a first temperature control section, a second temperature control section, a third temperature control section and a cooling section; the inlet of said thermal return pipe (5) being mounted above the rapid cooler (2); the outlet of said heat return pipe (5) being mounted above the cooling section of the heat treatment device (3); the side part of the blast cooler (2) located below the conveyor belt (6), being equipped with a cold air inlet (7); the cold air fan (8) being mounted next to the rapid cooler (2); the inlet of the cold air fan (8) going outwards; the air outlet being connected to - the cold air inlet (7) of the blast cooler (2) using a hose. 2 Furnace according to claim 1, characterized in that a plurality of first grooves (11) being provided in the first temperature control section in said heat treatment conveyor belt (4); a plurality of second grooves (12) being provided in the second temperature control section; a plurality of third grooves (13) being provided in the third temperature control section; the electric radiating tube (14) being mounted in the first groove (11), the second groove (12) and the third groove (13).
    3 Furnace according to claim 1, characterized in that the quantity of the electric radiating tube (14) in the first groove (11) is greater than the quantity of the electric radiating tube (14) in the second groove (12).
    4 Oven according to claim 1, characterized in that said heat treatment device (3) is located at the top of the first temperature control section, the second temperature control section and the third temperature control section, is fitted with a homogeneous air fan with spherical blades (9).
    5 Oven according to claim 1, characterized in that the heat-insulating layer (10) is provided on the inner wall of said heat return pipe (5) and at the top inside the heat treatment device (3).
    6 Oven according to claim 1, characterized in that the mesh conveyor belt of said heat treatment conveyor belt (4) is a woven herringbone belt. 7 Furnace according to claim 1, characterized in that a Y-shaped discharge port is mounted in the discharge location of said heat treatment conveyor belt (4).
    8 Furnace according to claim 1, characterized in that an orifice for collecting oxide scale (16) is mounted at the bottom of said rapid cooler (2). 9 Oven according to claim 1, characterized in that a honeycomb panel (17) being mounted in said rapid cooler (2); said panel (17) lying above the conveyor belt; said panel (17) being of heat resistant and high temperature stainless steel.
    10 A method of heat treatment of the furnace according to claim 1, comprising the following steps:
    101) The pretreated parts of the modular forged steel piston being rapidly cooled on the blast cooler (2), the temperature of which is reduced to 720 degrees from 1050 degrees;
    102) The pretreated parts of the forged steel modular piston preserving heat for 0.5 hour on the first temperature control section of the heat treatment device (3),
    whose temperature is reduced to 420 degrees from 720 degrees;
    103) The pretreated parts of the modular forged steel piston being slowly cooled on the second temperature control section of the heat treatment device (3);
    104) The pretreated parts of the forged steel modular piston preserving heat for 0.2 hours on the third temperature control section of the heat treatment device (3),
    whose temperature is reduced to 200 degrees from 420 degrees;
    105) The pretreated parts of the modular forged steel piston being air-cooled after exiting from the heat treatment device (3).
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    同族专利:
    公开号 | 公开日
    CN110527813A|2019-12-03|
    BE1027328B1|2021-01-14|
    BE1027328A1|2021-01-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR86712E|1959-09-10|1966-04-01|Houilleres Bassin Du Nord|Furnace for processing agglomerated fuels|
    US3351687A|1965-01-08|1967-11-07|Midland Ross Corp|Method and apparatus for firing ceramic bodies|
    US4457493A|1982-06-24|1984-07-03|Kanto Yakin Kogyo Kabushiki Kaisha|Gas atmosphere heating furnace|
    US8039289B2|2009-04-16|2011-10-18|Tp Solar, Inc.|Diffusion furnaces employing ultra low mass transport systems and methods of wafer rapid diffusion processing|
    CN203174149U|2012-12-21|2013-09-04|苏州工业园区久禾工业炉有限公司|Cooling production line of non-quenched and tempered steel after forging|
    法律状态:
    2021-03-19| FG| Patent granted|Effective date: 20210114 |
    优先权:
    申请号 | 申请日 | 专利标题
    CN201910908439.7A|CN110527813A|2019-09-25|2019-09-25|A kind of steel die forging piston heat treatment adjustable temperature control furnace and its heat-treatment technology method with effects of energy saving and emission reduction|
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