CN209854207U - Combined bolt production line - Google Patents
Combined bolt production line Download PDFInfo
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- CN209854207U CN209854207U CN201920629898.7U CN201920629898U CN209854207U CN 209854207 U CN209854207 U CN 209854207U CN 201920629898 U CN201920629898 U CN 201920629898U CN 209854207 U CN209854207 U CN 209854207U
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Abstract
The application relates to a combined bolt production line, and belongs to the technical field of high-strength bolt production lines. The automatic transmission system is used for conveying the bolts from the bolt forming system to the quenching system, from the quenching system to the atmosphere heat treatment system and from the atmosphere heat treatment system to the coating system; the quenching system includes a plurality of first unit furnaces that may be connected in series with each other, and the atmospheric heat treatment system includes a plurality of second unit furnaces that may be connected in series with each other. The combined bolt production line integrates the processes of bolt forming, quenching, tempering, surface treatment and the like into one production line, reduces the transportation cost, improves the bolt production efficiency, can freely combine and match unit furnaces according to the yield and the heat treatment technical requirements, avoids the inflexibility of a single fixed system or a heat treatment furnace, reasonably utilizes heat energy, and reduces the waste of heat energy.
Description
Technical Field
The application relates to the technical field of high-strength bolt production lines, in particular to a combined bolt production line.
Background
The production process of the bolt, especially the high-strength bolt mainly comprises the following steps: the method comprises the following important steps of raw material blanking, bolt forming, heat treatment (generally quenching and high-temperature tempering), surface anticorrosion treatment and the like.
In the current high strength bolt production process, the problem that exists at present is: (1) bolt forming, heat treatment and surface treatment of domestic manufacturers are carried out separately and are not carried out in the same workshop or the same manufacturer, so that the transportation cost is greatly increased. (2) The equipment and capacity for performing the heat treatment (quenching and tempering) are fixed, and the continuous treatment is not flexible and is not favorable for the change of the throughput.
SUMMERY OF THE UTILITY MODEL
The application provides a modular bolt production line, with processes such as bolt shaping, quenching, tempering, surface treatment aggregate in a production line, reduced the cost of transportation, improved bolt production's efficiency, simultaneously, can carry out unit stove independent assortment and collocation according to output and thermal treatment technical requirement, avoided the inflexible nature of single fixed system or thermal treatment stove, rational utilization heat energy reduces the waste of heat energy, makes above-mentioned problem obtain improving.
The combined bolt production line comprises a bolt forming system, a quenching system, an atmosphere heat treatment system, a coating system and an automatic transmission system; the bolt forming system, the quenching system, the atmosphere heat treatment system and the coating system are sequentially arranged, and the automatic transmission system is used for conveying the bolts from the bolt forming system to the quenching system, from the quenching system to the atmosphere heat treatment system and from the atmosphere heat treatment system to the coating system; the quenching system includes a plurality of first unit furnaces that may be connected in series with each other, and the atmospheric heat treatment system includes a plurality of second unit furnaces that may be connected in series with each other.
According to the combined bolt production line, the processes of bolt forming, quenching, tempering, surface treatment and the like are integrated into one production line through the automatic transmission system, so that the transportation cost is reduced, and the production efficiency of high-strength bolts is improved; the unit furnaces of the quenching system and the atmosphere heat treatment system (for tempering) can be freely combined and matched according to the yield and the heat treatment technical requirements, so that the inflexibility of a single fixed system or a heat treatment furnace is avoided, the utilization rate of heat energy is improved, and the waste of heat energy is reduced.
In addition, the combined bolt production line according to the embodiment of the application also has the following additional technical characteristics:
according to some embodiments of the present application, each unit furnace includes a furnace body in which a furnace chamber opened at both ends is formed, and a furnace door detachably coupled to the furnace body for closing the furnace chamber, and a connection portion formed on both end surfaces of the furnace body for connecting with another unit furnace.
In the above embodiment, the oven chambers with openings at both ends can realize the communication of each unit oven when the oven chambers are arranged in series, and the oven door can seal the oven chambers to form sealed chambers; the connection of two adjacent unit furnaces can be realized through the connecting part, and the assembly efficiency of the plurality of unit furnaces in series connection is improved.
Optionally, the connecting portion is provided with a connecting hole, the connecting holes of two adjacent unit furnaces are correspondingly arranged, and the two adjacent unit furnaces are detachably connected through a locking piece arranged in the connecting hole in a penetrating manner.
In the above embodiment, the locking member is used for detachably connecting two adjacent unit furnaces, so that the assembling efficiency is improved, and the unit furnaces can be combined in different modes to adapt to the heat treatment of bolts with different quantities.
According to some embodiments of the present application, the quenching system further comprises at least one first seal, each first seal being disposed between two adjacent first unit furnaces; the atmosphere heat treatment system further comprises at least one second sealing member, each second sealing member is arranged between two adjacent second unit furnaces; the quenching system also comprises at least one first cooling water pipe, the first cooling water pipe is annular, and each first cooling water pipe is arranged between two adjacent first unit furnaces; the atmosphere heat treatment system also comprises at least one second cooling water pipe, the second cooling water pipe is annular, and each second cooling water pipe is arranged between two adjacent second unit furnaces.
In the embodiment, the two adjacent first unit furnaces are in sealed connection through the first sealing element, so that the sealing effect of the two adjacent first unit furnaces is improved, the heat energy is prevented from escaping, and the heat energy can be reasonably controlled; the sealing connection of two adjacent second unit furnaces is realized through the second sealing element, the sealing effect of the two adjacent second unit furnaces is improved, the heat energy is prevented from escaping, and the heat energy can be reasonably controlled. The setting of first condenser tube can cool down the junction of two adjacent first unit stoves, prevents that the high temperature of junction from destroying the sealed effect of connection. The second cooling water pipe is arranged, so that the joint of two adjacent second unit furnaces can be cooled, and the phenomenon that the joint is too high in temperature and the sealing effect of connection is damaged is prevented.
According to some embodiments of the application, every unit stove is provided with intake pipe, blast pipe and stirring fan subassembly, the one end of intake pipe be located the top of unit stove and with the furnace chamber intercommunication of unit stove, the other end and the outside air supply intercommunication of intake pipe, the one end of blast pipe be located the bottom of unit stove and with the furnace intercommunication of unit stove, the other end of blast pipe stretches out the unit stove, stirring fan subassembly sets up in unit stove inside and installs in the top of unit stove.
In the above embodiment, the protective atmosphere is input into the furnace through the gas inlet pipe to provide atmosphere for the bolts in the furnace; exhaust the tail gas through the blast pipe, the stirring fan subassembly is used for improving the homogeneity of the atmosphere in the furnace, adjusts the atmosphere in the furnace.
According to some embodiments of the application, the quenching system further comprises a water bath heating assembly, the water bath heating assembly is located between the first unit furnace and the second unit furnace, the water bath heating assembly comprises a water bath, an upper pipeline, a lower pipeline and a water pump, the upper pipeline is mounted on the upper portion of the water bath and communicated with the inside of the water bath, the lower pipeline is mounted on the lower portion of the water bath and communicated with the inside of the water bath, the water inlet end of the water pump is communicated with the lower pipeline, the water outlet end of the water pump is communicated with the upper pipeline, and the water bath, the lower pipeline, the water pump and the upper pipeline form a heating water circulation loop.
In the above embodiment, the water bath, the lower pipeline, the water pump and the upper pipeline form a heating water circulation loop, so that the quenching medium in the water bath is uniformly mixed.
According to some embodiments of the present application, the water bath is filled with cooling water or a polymeric water-soluble quenching medium.
In the above embodiment, the quenching cooling is performed by using water or a polymer water-soluble quenching medium, and is not performed by using any type of oil, so that the procedures of oil stain cleaning treatment on the surface of the bolt are reduced, and the environmental pollution in the production process is reduced.
According to some embodiments of the present application, the automatic transmission system includes a first transmission roller set, a second transmission roller set, a manipulator, a third transmission roller set and a fourth transmission roller set, the first transmission roller set and the second transmission roller set are respectively located at the inlet end and the outlet end of the plurality of first unit furnaces, the manipulator is used in cooperation with the water bath heating assembly, the third transmission roller set and the fourth transmission roller set are respectively located at the inlet end and the outlet end of the plurality of second unit furnaces, the manipulator is used for sending the tool transmitted by the second transmission roller set into the water bath, and the manipulator is used for sending the tool in the water bath onto the third transmission roller set, and the first transmission roller set, the second transmission roller set, the manipulator, the third transmission roller set and the fourth transmission roller set are all electrically connected with the external control device.
In the embodiment, the transmission between the bolt forming system and the quenching system, between the water bath heating assembly and the atmosphere heat treatment system, and between the atmosphere heat treatment system and the coating system is realized through roller transmission, so that the automatic transmission efficiency is improved; due to the arrangement of the mechanical arm, the workpiece can be conveniently taken and placed in the water bath, and the transmission efficiency is improved.
According to some embodiments of the present application, the inner wall of each second unit furnace is made of an alumina impervious brick.
In the embodiment, the alumina anti-permeability brick has the characteristics of strong acid and alkali atmosphere resistance and reduction resistance, good thermal shock resistance, low thermal conductivity and good heat preservation performance.
According to some embodiments of the present application, the paint coating system employs a zinc-aluminum coated paint coating system.
In the above embodiment, the bolt is coated with the zinc-aluminum coating after tempering, and a high-quality, long-life, high-strength bolt with corrosion in the marine environment can be obtained.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic view of a modular bolt production line provided in an embodiment of the present application;
FIG. 2 is a schematic view of a series of two unit furnaces of FIG. 1;
FIG. 3 is a schematic view showing the arrangement of cooling water pipes in series of two unit furnaces of FIG. 1;
fig. 4 is a schematic structural view of the water bath heating assembly of fig. 1.
Icon: 100-a combined bolt production line; 1-assembling; 2-a quenching system; 21-a first unit furnace; 22-water bath heating assembly; 221-water bath; 222-an upper pipe; 223-lower pipe; 224-a water pump; 225-a sensor; 23-furnace body; 24-oven door; 25-hearth; 3-atmosphere heat treatment system; 31-a second unit furnace; 4-a paint application system; 51-a first set of drive rollers; 52-a second set of drive rollers; 53-a third set of drive rollers; 54-a fourth set of drive rollers; 61-a connecting portion; 62-a retaining member; 63-a seal; 64-a cooling water pipe; 65-an air inlet pipe; 651-gas vortex street flow sensor; 652-solenoid valve; 653-pressure reducing valves; 654-gas source; 66-an exhaust pipe; 67-stirrer fan assembly; 7-drying equipment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The production process of the bolt, especially the high-strength bolt mainly comprises the following steps: the method comprises the following important steps of raw material blanking, bolt forming, heat treatment (generally quenching and high-temperature tempering), surface anticorrosion treatment and the like. The quenching furnace and the tempering furnace are different, the quenching furnace is used for quenching and heating, and in order to prevent the phenomena of surface oxidation and decarburization during quenching and heating, protective atmospheres such as nitrogen, argon, alcohol cracking gas and the like need to be introduced during heating. The tempering furnace aims to carry out tempering treatment after bolt quenching, and carry out surface gas co-permeation protection treatment while tempering, wherein the main atmosphere is ammonia, air, acetone cracking gas, water vapor and the like. After the gas co-permeation treatment, the sample is directly subjected to surface coating of zinc-aluminum coating (or Dacromet coating treatment), and then is dried to obtain a finished bolt product, and the production line is finished. There is no need to perform any surface cleaning treatment before the zinc-aluminum coating is performed.
A modular bolt production line 100 according to an embodiment of the first aspect of the present application is described below with reference to the drawings.
As shown in fig. 1, a modular bolt production line 100 according to an embodiment of the present application includes: the bolt forming system, the quenching system 2, the atmosphere heat treatment system 3, the coating system 4 and the automatic transmission system.
Specifically, a bolt forming system, a quenching system 2, an atmosphere heat treatment system 3 and a coating system 4 are sequentially arranged, and a plurality of bolt production processes are as follows: bolt forming, quenching, tempering, surface treatment and the like are combined into a production line, so that the systematic production of the high-strength bolt is realized, and the production efficiency of the high-strength bolt is improved. The automatic transmission system is used to send bolts (workpieces of high-strength bolts, i.e., formed bolts) from the bolt forming system to the quenching system 2, from the quenching system 2 to the atmosphere heat treatment system 3, and from the atmosphere heat treatment system 3 to the paint coating system 4. After the bolts are formed, the bolts are arranged in the tool 1, so that batch processing of the bolts is facilitated, and the tool 1 is used for bearing the bolts and facilitating transportation of the bolts. In this high-strength bolt production line, the quenching system 2 includes a plurality of first unit furnaces 21 (quenching heating furnaces) that can be connected in series with each other, and the atmosphere heat treatment system 3 includes a plurality of second unit furnaces 31 (tempering heating furnaces) that can be connected in series with each other, and the first unit furnace 21 and the second unit furnace 31 have the same structure. According to the bolt output and the heat treatment technical requirement, different numbers of unit furnaces (the first unit furnace 21 and the second unit furnace 31 are abbreviated as the same as the context of the application) can be selected for free combination and matching, and the inflexibility of a single fixed system or a heat treatment furnace is avoided.
According to the combined bolt production line 100, the processes of bolt forming, quenching, tempering, surface treatment and the like are integrated into one production line through the automatic transmission system, so that the transportation cost is reduced, and the production efficiency of high-strength bolts is improved. The multiple unit furnaces of the quenching system 2 and the atmosphere heat treatment system 3 can be combined, and optimization calculation and combination adjustment of the unit modules can be carried out at any time according to the yield and the technical requirements, so that the resource waste can be effectively avoided, and the production efficiency can be obviously improved.
According to some embodiments of the present application, a bolt forming system includes a feeder, a flash heater, a die forging machine, and a threading machine, by which a raw material rod-to-bolt forming operation can be performed.
The feeder adopts chain drive, and the feeder includes motor and chain drive belt, and the motor is connected with the external control ware electricity, and the action wheel is connected to the output of motor, and the chain drive belt overlaps respectively to be located the action wheel and follow the driving wheel on, and the motor rotates and can drive the action wheel and rotate, and the action wheel rotates and drives chain drive belt and rotate from the driving wheel to realize chain drive. The chain transmission belt is customized according to the size of the workpieces (raw material rods), the raw material rods are uniformly placed on the chain of the chain transmission belt, each workpiece is separated from each other by the chain teeth, and each time the chain transmits, the next raw material rod is sent. The tip of feeder is provided with the transition zone, and the one end of keeping away from the feeder of transition zone is provided with the track of being connected with quick heater, and when the raw material stick delivered to the tip of chain drive belt, the raw material stick fell into the transition zone under the transport of chain drive belt, and the raw material stick removed to the track of being connected with quick heater through the transition zone, then promoted the raw material stick by the push rod that can freely stretch out and draw back and remove, heated in getting into quick heater with this raw material stick. During heating, the push rod returns to the original position, then the chain transmission belt sends a raw material rod again to get off, and after the heating of first raw material rod was accomplished, the push rod can promote the second raw material rod and get into rapid heater in, and it is ejecting with first raw material rod simultaneously. A material loading area and a mechanical arm are arranged beside the rapid heater, a raw material rod ejected out of the rapid heater is temporarily placed in the material loading area, and the mechanical arm places the raw material rod into a die of a die forging forming machine for compression molding; the workpiece after compression molding is sent to a thread forming machine by a manipulator to form the workpiece into a bolt.
The rapid heater is an all-solid-state medium-frequency induction heater, and specific parameters of the rapid heater can be selected and set according to the size of a bolt to be formed; the die forging forming machine is used for die-forming the end part of the bolt by the raw material rod, namely the raw material rod is die-formed into a bolt to-be-machined part with a head part, and the bolt to-be-machined part at the moment has no threads.
After the bolts are formed, the bolts need to be detected, and the qualified bolts are installed into the tool 1 (for bearing the bolts and transporting the bolts). The tool 1 is made of heat-resistant steel and is designed and manufactured mainly according to the size of a workpiece and the charging amount, and the surface of the tool 1 is coated with impermeable paint.
According to some embodiments of the present application, the first unit furnace 21 of the quenching system 2 and the second unit furnace 31 of the atmosphere heat treatment system 3 are heat treatment furnaces, and the first unit furnace 21 and the second unit furnace 31 have the same structure and are arranged at different positions due to different purposes of the first unit furnace 21 and the second unit furnace 31. As shown in fig. 2, each unit furnace includes a furnace body 23 and a furnace door 24, a hearth 25 with openings at both ends is formed in the furnace body 23, the tool 1 loaded with the bolts can enter the hearth 25 from one end of the hearth 25, and can be sent out through the other end of the hearth 25 after being heated in the hearth 25, thereby improving the efficiency of bolt heat treatment. The furnace door 24 is detachably connected to the furnace body 23 for closing the furnace cavity 25, and the opening of the furnace cavity 25 can be closed by connecting the furnace door 24 with the furnace body 23, so that the closing of the unit furnace is realized, and the heating treatment in the furnace cavity 25 is completed. Two end faces (end faces with the opening of the hearth 25) of the furnace body 23 are provided with connecting parts 61 for connecting with another unit furnace, and because the furnace doors 24 are detachably connected with the furnace body 23, when two unit furnaces are required to be connected in series, the furnace doors 24 opposite to the two adjacent unit furnaces are removed, so that the end faces of the furnace bodies 23 of the unit furnaces are attached to each other and connected through the connecting parts 61. The connection of two adjacent unit furnaces can be realized by the connection part 61, and the assembly efficiency in the series connection of a plurality of unit furnaces is improved.
It should be noted that the end face of the furnace body 23 is a plane, and when two adjacent unit furnaces are connected, the end faces of the furnace bodies 23 of the two adjacent unit furnaces are attached to each other, so that good sealing performance is ensured. Meanwhile, the quenching system 2 is disposed adjacent to the atmospheric heat treatment system 3, but not connected to the same, and the adjacent two unit furnaces in this application refer to the adjacent two first unit furnaces 21 or the adjacent two second unit furnaces 31, instead of the adjacent first unit furnace 21 and second unit furnace 31.
According to some embodiments of the present application, as shown in fig. 2, the connecting portion 61 is disposed to protrude from the furnace body 23, the plurality of connecting portions 61 are disposed around the circumference of the furnace body 23, each connecting portion 61 is provided with a connecting hole, the connecting holes of two adjacent unit furnaces are correspondingly disposed, and the two adjacent unit furnaces are detachably connected through the locking member 62 disposed in the connecting hole. The connecting portion 61 can be understood as a connecting flange for assembly connection of two adjacent unit furnaces, and the detachable connection of the two adjacent unit furnaces is realized through the locking member 62, so that the assembly efficiency is improved, and the different modes of combining the unit furnaces are facilitated to adapt to the heat treatment of different numbers of high-strength bolts. As an alternative to the present application, retaining member 62 employs a high temperature resistant bolt assembly for ease of assembly and disassembly. In other embodiments of the present application, the retaining member 62 may be other threaded retaining members, as long as disassembly and assembly are facilitated.
According to some embodiments of the present application, as shown in fig. 2, the quenching system 2 further includes at least one first seal 63, each first seal 63 being disposed between two adjacent first unit furnaces 21; the atmosphere heat-treating system 3 further includes at least one second sealing member 63, and each second sealing member 63 is disposed between adjacent two of the second unit furnaces 31. The first sealing member 63 and the second sealing member 63 are of the same structure, both of which are silicon rubber sealing members 63, a groove is formed in the end face of the furnace body 23, the sealing members 63 are located in the grooves, and the adjacent two unit furnaces are locked by the locking members 62. As an alternative to the present application, the locking member 62 is a bolt, which facilitates disassembly and assembly.
In the above embodiment, the first sealing member 63 is used to realize the sealing connection between two adjacent first unit furnaces 21, so that the sealing effect between two adjacent first unit furnaces 21 is improved, the escape of heat energy is avoided, and the heat energy can be reasonably controlled; the sealing connection between two adjacent second unit furnaces 31 is realized through the second sealing element 63, the sealing effect between two adjacent second unit furnaces 31 is improved, the escape of heat energy is avoided, and the heat energy can be reasonably controlled.
Further, as shown in fig. 3, the quenching system 2 further includes at least one first cooling water pipe 64, the first cooling water pipe 64 is annular, and each first cooling water pipe 64 is disposed between two adjacent first unit furnaces 21; the atmosphere heat treatment system 3 further includes at least one second cooling water pipe 64, the second cooling water pipe 64 having a ring shape, and each second cooling water pipe 64 is disposed between two adjacent second unit furnaces 31. The cooling water pipes 64 are arranged in the circumferential direction of the unit furnaces, the cooling water pipes 64 and an external water source form a circulating water system, and cooling water flows through the cooling water pipes 64, so that the sealing parts of the two unit furnaces are cooled, the joint of the two adjacent first unit furnaces 21 can be cooled, and the silicone rubber at the joint is prevented from being burnt.
Wherein the first unit furnace 21 and the second unit furnace 31 are protective atmosphere box type heat treatment furnaces, the furnace body 23 of the unit furnace is provided with refractory bricks, the outside of the furnace body 23 is provided with a stainless steel shell, and the heating elements of the unit furnace comprise a radiant tube heater and a thermocouple. As shown in fig. 2, each unit furnace is provided with an air inlet pipe 65, an air outlet pipe 66 and a stirring fan assembly 67, one end of the air inlet pipe 65 is positioned at the top of the unit furnace and is communicated with the hearth 25 of the unit furnace, the other end of the air inlet pipe 65 is communicated with an external air source 654, and protective atmosphere is introduced into the hearth 25 through the external air source 654; one end of the exhaust pipe 66 is positioned at the bottom of the unit furnace and is communicated with the hearth 25 of the unit furnace, and the exhaust pipe 66 is used for exhausting tail gas generated in the heat treatment process; stirring fan subassembly 67 sets up inside the unit stove to install in the top of unit stove, stirring fan subassembly 67 sets up with intake pipe 65 is adjacent, stirring fan subassembly 67 includes motor and flabellum, and the motor is connected with external control ware electricity, and the motor circular telegram drives the flabellum and rotates to stir the air flow in the furnace 25, thereby realizes the regulation of the atmosphere in the furnace 25, improves the homogeneity of atmosphere.
The gas inlet pipe 65 is arranged at the top of the hearth 25, and the stirring fan assembly 67 is more beneficial to gas circulation for many times, so that the use efficiency of the gas is improved, and the gas is prevented from being exhausted out of the furnace too early to cause great waste; the exhaust pipe 66 is placed at the bottom of the furnace 25, which is more favorable for the gas to flow to each corner in the furnace 25, thereby accelerating the gas recycling and avoiding non-uniformity.
In order to avoid environmental pollution, a combustion assembly is arranged at the end of the exhaust pipe 66, the combustion assembly is communicated with natural gas, and the tail gas is combusted through the natural gas combustion-supporting tail gas, so that the tail gas is subjected to harmless treatment (the tail gas is subjected to sufficient combustion treatment and mainly comprises water vapor, nitrogen and a small amount of carbon dioxide gas after combustion).
A gas vortex flow sensor 651 and an electromagnetic valve 652 are arranged on a connecting pipeline of the gas inlet pipe 65 and an external gas source 654, the gas vortex flow sensor 651 is used for measuring the flow of protective atmosphere entering the hearth 25, the electromagnetic valve 652 is connected with the gas vortex flow sensor 651, and the electromagnetic valve 652 adjusts the flow in the pipeline according to a signal fed back by the gas vortex flow sensor 651. A pressure reducing valve 653 is provided at the outlet end of the gas source 654 to adjust the pressure of the atmosphere output from the gas source 654 to a reasonable output pressure to accommodate the heat treatment operation of the unit furnace.
The unit furnace adopts a box-type resistance furnace, is simple and convenient to operate, has accurate temperature control, and can be filled with protective gas to prevent parts from being oxidized during heating and the like; the unit furnace adopts a roller hearth type conveying mode, a roller wheel assembly is arranged at the bottom of the hearth 25, and the tool 1 in the hearth 25 is driven to move in the hearth 25 through the rotation of the roller wheel assembly.
The first unit furnace 21 of the quenching system 2 adopts a protective atmosphere, including but not limited to alcohol pyrolysis gas, or protective atmospheres such as argon and nitrogen, which can prevent the surface decarburization and oxidation of the bolt during high-temperature heating, and can also overcome the cracking of the bolt during water-cooling quenching. The atmosphere heat treatment system 3 mainly performs tempering treatment, the second unit furnace 31 adopts protective atmosphere including but not limited to ammonia gas, air, steam, acetone cracking atmosphere and other protective atmosphere, surface gas co-permeation treatment is performed in the tempering process at proper time, and surface nitrogen, oxygen, carbon and other co-permeation treatment is performed on the bolt, so that the surface hardness, strength and corrosion resistance of the bolt are improved. The gas source (gas source type, quantity, etc.) adopted by each unit furnace is selected according to the actual process condition, and the application is not limited.
In order to ensure the quality of the bolts after heat treatment, the unit furnaces are also connected with an alarm system, each unit furnace is provided with a temperature sensor, the temperature sensor and the gas vortex flow sensor 651 are both connected with the alarm system, and a controller of the alarm system controls the working state of the alarm according to signals fed back by the temperature sensor and the gas vortex flow sensor 651 so as to remind an operator.
All steel parts in the unit furnace are made of heat-resistant stainless steel; because the surface gas co-permeation protection treatment is required during tempering, all steel parts in the second unit furnace 31 (tempering unit furnace) are stainless steel parts subjected to hot dip aluminizing treatment, and the adsorption of co-permeation gas in the co-permeation process is mainly prevented.
The inner wall of the second unit furnace 31 is made of alumina impervious bricks according to the difference of the heat treatment process. The impervious alumina brick has the features of high acid and alkali atmosphere resistance, high reduction resistance, high heat shock resistance, low heat conductivity and high heat insulating performance, and may be used as heat insulating layer of high temperature heat engineering equipment or the lining of kiln and precise heat engineering equipment.
In this high strength bolt production line, the bolt adopts water-cooling quenching, and quenching system 2 still includes water bath heating subassembly 22. The water bath heating assembly 22 is positioned between the first unit furnace 21 and the second unit furnace 31, the water bath heating assembly 22 is positioned at the outlet of the first unit furnace 21, and the bolts are heated by the first unit furnace 21 and then enter the water bath heating assembly 22 for water cooling quenching. As shown in fig. 4, the water bath heating assembly 22 includes a water bath 221, an upper pipe 222, a lower pipe 223 and a water pump 224, wherein the upper pipe 222 is installed on the upper portion of the water bath 221 and is communicated with the inside of the water bath 221, the lower pipe 223 is installed on the lower portion of the water bath 221 and is communicated with the inside of the water bath 221, the water inlet end of the water pump 224 is communicated with the lower pipe 223, the water outlet end of the water pump 224 is communicated with the upper pipe 222, and the water bath 221, the lower pipe 223, the water pump 224 and the upper pipe 222 form a heating water circulation loop.
The water bath 221, the lower pipeline 223, the water pump 224 and the upper pipeline 222 form a heating water circulation loop, the water pump 224 pumps out the quenching medium in the water bath 221 and injects the quenching medium into the water bath 221 from the top of the water bath 221, so that the quenching medium in the water bath 221 is uniformly stirred and mixed. And water cooling quenching is adopted, so that oil and a polymer quenching medium are avoided, the environmental pollution is reduced, and the cost is reduced.
The water bath 221 is provided with a sensor 225 for monitoring the concentration of the quenching medium, and the water bath 221 is filled with cooling water or a polymer water-soluble quenching medium. The quenching cooling adopts water or polymer water-soluble quenching medium for cooling, and does not adopt any type of oil for cooling, thereby reducing the working procedure of cleaning oil stain on the surface of the bolt and lightening the environmental pollution in the production process. The concentration of the polymer water-soluble quenching medium is controlled by adopting a JBT 4392-2011 polymer water-soluble quenching medium measuring method.
According to some embodiments of the present application, the automatic transmission system includes a first transmission roller set 51, a second transmission roller set 52, a manipulator (not shown), a third transmission roller set 53 and a fourth transmission roller set 54, and each transmission roller set transmits a roller way to perform the tool 1 transmission. The first transmission roller set 51 and the second transmission roller set 52 are respectively located at the inlet ends and the outlet ends of the first unit furnaces 21, the manipulator is matched with the water bath heating assembly 22 for use, the third transmission roller set 53 and the fourth transmission roller set 54 are respectively located at the inlet ends and the outlet ends of the second unit furnaces 31, the manipulator is used for sending the tool 1 transmitted by the second transmission roller set 52 into the water bath pot 221, the manipulator is used for sending the tool 1 in the water bath pot 221 to the third transmission roller set 53, and the first transmission roller set 51, the second transmission roller set 52, the manipulator, the third transmission roller set 53 and the fourth transmission roller set 54 are all electrically connected with external control equipment. Due to the arrangement of the automatic transmission system, the transmission efficiency of the tool 1 among bolt processing technologies is improved, the transmission automation is improved, and manual operation is reduced.
According to some embodiments of the present application, the bolt does not need any surface cleaning before the surface coating system 4 is performed, thereby avoiding the use of the existing pickling, alkaline washing, sand blasting or shot blasting processes and reducing environmental pollution. The coating system 4 adopts a zinc-aluminum coating system, so that the zinc-aluminum coating is coated on the surface of the bolt. The zinc-coated aluminum coating system comprises a Dacromet coating device and a drying device 7, the bolt is sent into the drying device 7 after being subjected to surface coating treatment, drying treatment is carried out after coating, the bolt is finally detected after drying, and qualified finished products are put into a storage device to be collected. The bolt produced by the combined bolt production line 100 in the embodiment of the application has the advantages of high production efficiency, low cost, no waste liquid and solid waste discharge and environmental pollution, and good anticorrosion effect of gas co-permeation and coating composite treatment.
According to some embodiments of the application, the high-strength bolt production line further comprises an electrical control system, each electrical component in the production line is electrically connected with the electrical control system, and the electrical control system controls the work of each electrical component through signals fed back by the electrical components.
According to some embodiments of the application, the high-strength bolt production line further comprises a visualization system, the visualization system comprises a monitor and a display screen, the monitor is electrically connected with the display screen, the monitor works to transmit signals to the display screen, and images are displayed on the display screen. The visual system is electrically connected with the alarm system and the electric control system, and an operator can process emergency situations, such as alarming and operations of cutting off electric elements and the like according to information displayed by the display screen.
The combined bolt production line 100 of the embodiment of the application integrates and integrates molding, heat treatment, surface corrosion prevention and the like of the high-strength bolt, and is more beneficial to management and control of product quality and reduction of production cost. Particularly, the controllable water bath is adopted for cooling after the heat treatment and quenching, so that the environmental pollution can be greatly reduced; the gas co-permeation treatment is carried out during the tempering process, so that the cost can be obviously reduced and the surface quality can be improved. Through the subsequent coating composite treatment, the high-strength bolt with high quality and long service life and marine environment corrosion resistance can be obtained. The combined production line is a major project in the marine environment of China: the production and manufacture of high-quality high-strength bolts used for offshore drilling platforms and sea-crossing bridges provides an important hardware foundation.
The beneficial effects of the combination formula bolt production line 100 of this application embodiment do:
1. the processes of bolt forming, quenching, tempering, surface treatment and the like are integrated into one production line through an automatic transmission system, so that the transportation cost is reduced, and the production efficiency of the high-strength bolt is improved; the unit furnaces can be freely combined and matched according to the yield and the heat treatment technical requirements, so that the inflexibility of a single fixed system or a heat treatment furnace is avoided, the utilization rate of heat energy is improved, and the waste of the heat energy is reduced;
2. in the whole production line, water or a water-soluble polymer medium is adopted for cooling, and no oil of any type is adopted for cooling, so that the working procedure of cleaning oil stains on the surfaces of the bolts is reduced, and the environmental pollution in the production process is reduced;
3. the quenching furnace adopts protective atmosphere to prevent the surface of the bolt from decarbonization and oxidation during high-temperature heating, and the tempering atmosphere heat treatment furnace can carry out surface gas co-permeation treatment in time during tempering, so that the surface mechanical property and the corrosion resistance of the bolt are improved;
4. the tail gas treatment carries out harmless treatment on the tail gas possibly generated in the production, thereby avoiding generating environmental pollution.
It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A combined bolt production line is characterized by comprising a bolt forming system, a quenching system, an atmosphere heat treatment system, a coating system and an automatic transmission system;
the bolt forming system, the quenching system, the atmosphere heat treatment system and the coating system are arranged in sequence, and the automatic transmission system is used for conveying bolts from the bolt forming system to the quenching system, from the quenching system to the atmosphere heat treatment system and from the atmosphere heat treatment system to the coating system;
the quenching system comprises a plurality of first unit furnaces which can be connected in series with each other, and the atmosphere heat treatment system comprises a plurality of second unit furnaces which can be connected in series with each other.
2. The modular bolt production line of claim 1, wherein each unit furnace comprises a furnace body in which a furnace chamber opened at both ends is formed, and a furnace door detachably coupled to the furnace body for closing the furnace chamber, the furnace body having a coupling portion formed on both end surfaces thereof for coupling with another unit furnace.
3. The combined bolt production line as claimed in claim 2, wherein the connecting portion is provided with connecting holes, the connecting holes of two adjacent unit furnaces are correspondingly arranged, and the two adjacent unit furnaces are detachably connected through locking members arranged in the connecting holes in a penetrating manner.
4. The modular bolt production line of claim 1, wherein the quenching system further comprises at least one first seal, each first seal being disposed between two adjacent first unit furnaces;
the atmosphere heat treatment system further comprises at least one second sealing member, and each second sealing member is arranged between two adjacent second unit furnaces;
the quenching system also comprises at least one first cooling water pipe, the first cooling water pipe is annular, and each first cooling water pipe is arranged between two adjacent first unit furnaces;
the atmosphere heat treatment system also comprises at least one second cooling water pipe, the second cooling water pipe is annular, and each second cooling water pipe is arranged between two adjacent second unit furnaces.
5. The modular bolt production line of claim 2, wherein each unit furnace is provided with an air inlet pipe, an air outlet pipe and a stirrer fan assembly, one end of the air inlet pipe is positioned at the top of the unit furnace and is communicated with the furnace chamber of the unit furnace, the other end of the air inlet pipe is communicated with an external air source, one end of the air outlet pipe is positioned at the bottom of the unit furnace and is communicated with the hearth of the unit furnace, the other end of the air outlet pipe extends out of the unit furnace, and the stirrer fan assembly is arranged inside the unit furnace and is installed at the top of the unit furnace.
6. The combined bolt production line of claim 1, wherein the quenching system further comprises a water bath heating assembly, the water bath heating assembly is located between the first unit furnace and the second unit furnace, the water bath heating assembly comprises a water bath, an upper pipeline, a lower pipeline and a water pump, the upper pipeline is mounted on the upper portion of the water bath and is communicated with the inside of the water bath, the lower pipeline is mounted on the lower portion of the water bath and is communicated with the inside of the water bath, the water inlet end of the water pump is communicated with the lower pipeline, the water outlet end of the water pump is communicated with the upper pipeline, and the water bath, the lower pipeline, the water pump and the upper pipeline form a heating water circulation loop.
7. The modular bolt production line of claim 6, wherein the water bath is filled with cooling water or a polymer water-soluble quenching medium.
8. The combined bolt production line of claim 6, wherein the automatic transmission system comprises a first transmission roller set, a second transmission roller set, a manipulator, a third transmission roller set and a fourth transmission roller set, the first transmission roller set and the second transmission roller set are respectively located at the inlet end and the outlet end of the first unit furnaces, the manipulator is used in cooperation with the water bath heating assembly, the third transmission roller set and the fourth transmission roller set are respectively located at the inlet end and the outlet end of the second unit furnaces, the manipulator is used for feeding the tools transmitted by the second transmission roller set into the water bath, and the manipulator is used for feeding the tools in the water bath onto the third transmission roller set, the first transmission roller set, the second transmission roller set, the third transmission roller set, the fourth transmission roller set, the third transmission roller set and the, The manipulator, the third transmission roller set and the fourth transmission roller set are all electrically connected with external control equipment.
9. The modular bolt production line of claim 1, wherein the inner wall of each second unit furnace is made of an alumina impervious brick.
10. The modular bolt production line of claim 1, wherein the paint coating system is a zinc-coated aluminum coating system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920629898.7U CN209854207U (en) | 2019-05-05 | 2019-05-05 | Combined bolt production line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920629898.7U CN209854207U (en) | 2019-05-05 | 2019-05-05 | Combined bolt production line |
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| CN209854207U true CN209854207U (en) | 2019-12-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111872204A (en) * | 2020-09-27 | 2020-11-03 | 招远春鹏电子科技有限公司 | Novel joint bolt forming device |
| CN112792520A (en) * | 2021-04-08 | 2021-05-14 | 北京铁科首钢轨道技术股份有限公司 | Automatic production system and production method for anchor bolt or T-shaped bolt through thermal forming |
| CN113047089A (en) * | 2021-04-08 | 2021-06-29 | 北京铁科首钢轨道技术股份有限公司 | Automatic production system and production method for thermal forming of spiral spike |
-
2019
- 2019-05-05 CN CN201920629898.7U patent/CN209854207U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111872204A (en) * | 2020-09-27 | 2020-11-03 | 招远春鹏电子科技有限公司 | Novel joint bolt forming device |
| CN111872204B (en) * | 2020-09-27 | 2021-01-22 | 山东八三石墨新材料厂 | Novel joint bolt forming device |
| CN112792520A (en) * | 2021-04-08 | 2021-05-14 | 北京铁科首钢轨道技术股份有限公司 | Automatic production system and production method for anchor bolt or T-shaped bolt through thermal forming |
| CN113047089A (en) * | 2021-04-08 | 2021-06-29 | 北京铁科首钢轨道技术股份有限公司 | Automatic production system and production method for thermal forming of spiral spike |
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