CN115725828A - Slider induction heat treatment processing technology - Google Patents
Slider induction heat treatment processing technology Download PDFInfo
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- CN115725828A CN115725828A CN202211498577.0A CN202211498577A CN115725828A CN 115725828 A CN115725828 A CN 115725828A CN 202211498577 A CN202211498577 A CN 202211498577A CN 115725828 A CN115725828 A CN 115725828A
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Abstract
The application provides a slider induction heat treatment processing technology, which comprises the following processing steps: annealing: placing a plurality of sliders to be processed in annealing equipment for annealing, and transferring the sliders to a pre-positioning station after annealing; pre-positioning: placing the annealed slide blocks on a circulating conveyor belt at a pre-positioning station, wherein a preset distance is formed between every two slide blocks along the conveying direction of the circulating conveyor belt, and the slide blocks are aligned to the center of an induction coil in high-frequency induction quenching equipment; high-frequency induction heating: when the slide block on the circulating type conveying belt enters a continuous heating area, a first high-frequency current is introduced into the induction coil to heat the induction position to be processed of the slide block to form a high-temperature area, and when the slide block is heated to reach a first preset temperature and surface thickness, subsequent cooling area cooling, tempering heating and normal-temperature cooling are sequentially carried out. The processing technology in the application replaces the production mode of the whole furnace carburizing and quenching of the linear slide block, and avoids the damage to the environment in the carburizing and quenching production process.
Description
Technical Field
The invention belongs to the technical field of heat treatment, and particularly relates to a slider induction heat treatment processing technology.
Background
The linear guide rail is also called a linear rail, a slide rail, a linear guide rail, a linear slide rail and the like, is used for linear reciprocating motion occasions, can bear certain torque, and can realize high-precision linear motion under the condition of high load. The linear sliding rail mainly comprises a sliding block and a guide rail, and the sliding block is mainly used for connecting the guide rail and a platform which needs to be driven to move on mechanical equipment, so that the linear sliding block has a vital function as an important component of the linear guide rail. With the rapid development of industry, the demand of linear guide rail products in the market is continuously increased.
At present, most of the heat treatment modes in the production process of linear sliders in the market are carburizing and quenching, namely, a workpiece (such as a steel piece) to be treated is placed in an active carburizing medium, heated to a single-phase austenite region at 900-950 ℃, and after the heat preservation is carried out for enough time, activated carbon atoms decomposed from the carburizing medium are infiltrated into the surface layer of the steel piece, so that high carbon on the surface layer is obtained, and the product, namely the linear slider, of which the core still keeps the original components is obtained.
However, the linear slider generates a large amount of three-waste pollutants in the carburizing and quenching process, and pollutes the environment.
Disclosure of Invention
The embodiment of the application provides a slider induction heat treatment processing technology, which can perform heating treatment on a linear slider by replacing carburizing and quenching with high-frequency induction quenching.
The embodiment provides a slider induction heat treatment processing technology, which comprises the following processing steps:
annealing: placing a plurality of sliders to be processed in annealing equipment for annealing, and transferring the sliders to a pre-positioning station after annealing;
pre-positioning: placing the annealed slide blocks on a circulating conveyor belt at a pre-positioning station, wherein a preset distance is formed between every two slide blocks along the conveying direction of the circulating conveyor belt, placing the to-be-processed areas of the slide blocks at an induction coil, and then preparing for induction quenching;
high-frequency induction heating: when the slide block on the circulating type conveying belt enters a continuous heating area, a first high-frequency current is immediately introduced into the induction coil to heat an induction position to be processed of the slide block to form a high-temperature area, redundant electromagnetic current generated in the heating process is guided to run off by the induction coil designed according to the outline shape of the area to be processed of the slide block, the outline current situation of the area to be processed of the slide block is matched with the inner and outer outline shapes of the induction coil, and when the slide block is heated to reach a first preset temperature and surface thickness, subsequent cooling area cooling, tempering heating and normal temperature cooling are sequentially carried out to form the processed slide block.
By adopting the technical scheme, the plurality of sliders to be processed are placed on the circulating conveyor belt, so that the plurality of sliders can continuously pass through different processing stations to form a continuous integral induction heat treatment technology; the induction coil in the high-frequency induction quenching equipment is an electromagnetic loop path designed according to the outline of the slide block to be processed, so that electromagnetic current gathered at the convex part of the outline of the slide block in a heating procedure can be guided to run off, and deformation and dissolution loss are avoided; the slide block to be processed is placed in the induction coil, when alternating current with certain frequency is introduced into the induction coil, an alternating magnetic field is generated around the slide block, and the electromagnetic induction action of the alternating magnetic field generates closed eddy current in the slide block, so that the production mode of carburizing and quenching the linear slide block in a whole furnace is replaced, and the damage to the environment in the carburizing and quenching production process is avoided.
In a possible implementation manner, the sequentially performing the subsequent cooling in the cooling zone, tempering and normal temperature cooling includes:
first high-pressure water column jet cooling: in the cooling area, high-pressure water columns and high-flow water columns are uniformly sprayed to the surface of the sliding block through a multi-point spraying sleeve, the inside and the outside of the sliding block are uniformly cooled forcibly, and the sliding block enters a tempering station after being cooled;
induction tempering and heating: when the slide block continuously enters a tempering heating area, immediately introducing a second high-frequency current to the induction coil of the tempering heating area, heating the to-be-processed induction position of the slide block to a second preset temperature to complete the tempering heating operation, and then entering a tempering cooling area;
and (3) secondary high-pressure water column jet cooling: after the sliding block enters the tempering cooling area, high-pressure water columns and large-flow water columns are uniformly sprayed to the surface of the sliding block through a multi-point spraying sleeve, and the inside and the outside of the sliding block are uniformly cooled in a forced mode;
and (3) cooling at normal temperature: and after the slide block is separated from the tempering cooling area, cooling at normal temperature.
By adopting the technical scheme, the slider after quenching is subjected to primary high-pressure water column jet cooling and is rapidly cooled, the cooling rate of the slider is set to an ideal cooling curve according to the material, the shape and the service requirement of the slider, and after the temperature of the slider is reduced to the set temperature, the slider is conveyed to a tempering station by a circulating conveyor belt to be tempered, so that the slider can reach certain hardness, the tempering treatment can eliminate residual stress generated during slider quenching, deformation and cracking are prevented, the hardness, the strength, the plasticity and the toughness of the slider can be adjusted, and the service performance requirement is met.
In one possible implementation, the preset distance in the pre-positioning step is 50mm to 100mm.
In one possible implementation, the conveying speed of the endless conveyor belt in the pre-positioning step is 3mm/s to 10mm/s.
In one possible implementation, the first preset temperature in the high-frequency induction heating step is 700 ℃ to 800 ℃, and the surface thickness is 5mm to 15mm.
In one possible implementation, the temperature of the annealing in the annealing step is 450-550 ℃, and the annealing time is 3-4 h.
In one possible implementation, the first high-frequency current in the high-frequency induction heating step is 55KHz to 65KHz.
In one possible implementation, the second high-frequency current in the induction tempering heating step is 5KHz to 15KHz.
In one possible implementation, the second preset temperature in the induction tempering heating step is 150 ℃ to 250 ℃.
In a possible implementation manner, an infrared temperature sensor is arranged on the surface of the sliding block, and the infrared temperature sensor is used for detecting the temperature of the surface of the sliding block.
The embodiment of the application provides a slider induction heat treatment processing technology, which is characterized in that a plurality of sliders to be processed are placed on a circulating conveyor belt, so that the sliders can continuously pass through different processing stations to form a continuous integral induction heat treatment technology; the inner contour shape of an induction coil in the high-frequency induction quenching equipment is designed according to the outer contour shape of the area to be processed of the sliding block, so that the electromagnetic current gathered at the convex part of the outer contour of the sliding block in the heating process can be guided to run off, and the deformation and the dissolution loss are avoided; the slider to be processed is placed in the induction coil, when alternating current with certain frequency is introduced into the induction coil, an alternating magnetic field is generated around the slider, and the electromagnetic induction action of the alternating magnetic field generates closed eddy current in the slider, so that the production mode of the whole linear slider carburizing and quenching is replaced, and the damage to the environment in the carburizing and quenching production process is avoided.
Drawings
FIG. 1 is a process flow diagram of a slider induction heat treatment process according to an embodiment of the present application.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, 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 only a part of the embodiments of the present application, and not all of the embodiments. 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.
In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; may be a mechanical connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the related technology, most of the heat treatment modes in the production process of linear sliders on the market are carburizing and quenching, namely, a workpiece (such as a steel part) to be treated is placed in an active carburizing medium, heated to a single-phase austenite region at 900-950 ℃, and after the heat preservation is carried out for enough time, activated carbon atoms decomposed from the carburizing medium are infiltrated into the surface layer of the steel part, so that high carbon on the surface layer is obtained, and the product, namely the linear slider, with the original components in the center is still maintained.
However, the linear slider generates a large amount of three-waste pollutants in the carburizing and quenching process, thereby polluting the environment.
Therefore, a slider to be processed can be placed in an induction coil, when alternating current with a certain frequency is introduced into the induction coil, an alternating magnetic field is generated around the slider, the electromagnetic induction action of the alternating magnetic field generates closed eddy current in the slider, and the induction coil in high-frequency induction quenching equipment is an electromagnetic loop path designed according to the outline of the slider to be processed, so that the electromagnetic current gathered at the protruding part of the slider outline in a heating procedure can be guided to run off, the deformation and the dissolution loss are avoided, the production mode of the whole linear slider carburizing and quenching is replaced, and the problems that a large amount of three-waste pollutants are generated in the carburizing and quenching process and the environment is polluted are solved.
FIG. 1 is a process flow diagram of a slider induction heat treatment process according to an embodiment of the present application.
Referring to fig. 1, a slider induction heat treatment processing technology includes the following processing steps:
s100, annealing: and placing a plurality of sliders to be processed in annealing equipment for annealing, and transferring the sliders to a pre-positioning station after annealing.
In some examples, the annealing temperature in the annealing step may be 450 ℃ to 550 ℃ and the annealing time may be 3h to 4h, for example, in a specific setting, the annealing temperature may be 450 ℃, 470 ℃, 500 ℃, 530 ℃, or 550 ℃, and the annealing time may be 3h, 3.5h, or 4h, and the annealing time may be determined according to the actual needs of the slider to be processed, so as to meet the requirements of the properties of wear resistance, fatigue strength, and hardness of the produced slider. In the embodiment of the application, firstly, the slider to be processed is annealed, the stress of the slider is reduced through annealing, the size is stabilized, and the deformation and crack tendency is reduced; refining crystal grains, adjusting the structure and eliminating the structure defects; the material structure and the composition are uniform, the material performance is improved or the structure preparation is made for the subsequent high-frequency induction heat treatment.
S200, pre-positioning: and placing the annealed slide blocks on a circulating conveyor belt at a pre-positioning station, wherein a preset distance is formed between every two slide blocks along the conveying direction of the circulating conveyor belt, placing the to-be-processed area of each slide block at an induction coil, and preparing for induction quenching.
The specific structure of the high-frequency induction quenching device can refer to the related content of the high-frequency induction quenching device in the prior art, and is not described herein again.
When the whole sliding block needs to be quenched, the area to be processed of the sliding block is placed in an inner cavity of an induction coil designed according to the outer contour of the sliding block; when the inner cavity of the sliding block needs to be quenched, the induction coil designed according to the outer contour of the inner cavity of the sliding block is placed in the inner cavity of the sliding block.
In some examples, the preset distance in the pre-positioning step may be 50mm-100mm, for example, in a specific setting, the preset distance may be an appropriate distance value such as 50mm, 60mm, 75mm, 80mm or 100mm, which may be determined according to the speed of the actual endless conveyor belt.
When the distance between the sliding blocks is too large, the former sliding block passes through the machining station, while the subsequent sliding blocks do not arrive, so that the machining efficiency is influenced; when the distance between the sliding blocks is too small, the machining between different sliding blocks is influenced, and the product performance is influenced.
In the embodiment of the application, the sliders are placed on the circulating conveyor belt at proper intervals, so that the sliders can continuously pass through different processing stations to form a continuous integral induction heat treatment technology, the capacity of rapid mass production is obtained, and the working efficiency is improved.
In some examples, the conveying speed of the endless conveyor belt in the pre-positioning step may be 3mm/s-10mm/s, for example, in a specific setting, the conveying speed of the endless conveyor belt may be a suitable speed such as 3mm/s, 4mm/s, 5mm/s, 7mm/s, 8mm/s or 10mm/s, which may be determined according to the actual heating requirement of the slider to be processed.
When the transmission speed of the circulating conveyor belt is too high, the slide block to be processed is easy to leave the station without being processed completely, and the slide block cannot meet the requirement due to incomplete processing; when the transmission speed of the circulating conveyor belt is too slow, the stay time of the sliding block at one station is easy to overlong, and the working efficiency is influenced.
In the embodiment of the application, the conveying speed of the circulating type conveying belt is limited, and the time of high-frequency induction heating treatment of the slide block to be treated can be accurately controlled, so that the hardening and forming effect of the slide block is better, and the obtained product quality is better.
S300, high-frequency induction heating: when the slide block on the circulating type conveying belt enters a continuous heating area, a first high-frequency current is immediately introduced into the induction coil to heat the to-be-processed induction position of the slide block to form a high-temperature area, the temperature of the high-temperature area is high enough to enable the material to quickly form a set tissue, and when the slide block is heated to reach a first preset temperature and surface thickness, subsequent cooling, tempering heating and normal-temperature cooling are sequentially performed in a cooling area.
Wherein, the surface thickness is the thickness of a hardened layer formed on the surface of the sliding block.
In some examples, the first preset temperature in the high-frequency induction heating step may be 700 ℃ to 800 ℃, and the surface thickness may be 5mm to 15mm, for example, in a specific setting, the first preset temperature may be 700 ℃, 750 ℃, 770 ℃ or 800 ℃, and the like, and the surface thickness may be 5mm, 8mm, 10mm, 13mm or 15mm, and the like, and may be determined according to the actual size and performance requirements of the slider to be processed.
In some examples, the first high-frequency current in the high-frequency induction heating step may be 55KHz to 65KHz, for example, when specifically setting up, the first high-frequency current may be 55KHz, 57KHz, 58KHz, 60KHz, 63KHz or 65KHz and other suitable frequencies, and specifically, the first high-frequency current may be selected according to the temperature required for actually heating the slider to be processed.
In the embodiment of the application, through adjusting the frequency of first high-frequency current, the heating temperature of induction coil in the regulation and control high-frequency induction quenching equipment that can be accurate, the control of collocation quenching time can accurately carry out thermal treatment to the slider, obtains better surface hardness to make the slider can have better wear resistance, and then obtain the better slider of performance.
In the embodiment of the application, the plurality of sliders to be processed are placed on the circulating conveyor belt, so that the plurality of sliders can continuously pass through different processing stations to form a continuous integral induction heat treatment technology; the slide block to be processed is placed in the induction coil, when alternating current with certain frequency is introduced into the induction coil, an alternating magnetic field is generated around the induction coil, and the electromagnetic induction action of the alternating magnetic field generates closed eddy current in the slide block, so that the production mode of the whole furnace carburizing and quenching of the linear slide block is replaced, and the damage to the environment in the production process of carburizing and quenching is avoided; the price of the high-frequency induction quenching equipment is lower than that of a multi-purpose furnace for carburizing and quenching, the capacity of one set of high-frequency induction quenching equipment is at least equal to that of three multi-purpose furnaces for carburizing and quenching, and the high-frequency induction quenching technology is low in cost and high in efficiency; and the carburizing and quenching equipment has large floor area, higher requirements on water, electricity and gas of a factory building, small floor area of the high-frequency induction quenching equipment and simple and convenient installation.
In the embodiment of the application, through the induction coil according to the profile design of pending slider, can be with the heating process in, the electromagnetic current guide of slider profile protrusion department gathering runs off, avoids taking place deformation and dissolving and decreases, realizes that whole induction hardening can use on complicated cross sectional shape, the regional linear slider that contains the closed angle of sclerosis, lets the thermal treatment of linear slider more easily and environmental protection, can carry out volume production and make.
In some examples, sequentially performing the subsequent cooling zone cooling, temper heating, and ambient cooling comprises:
s400, first high-pressure water column jet cooling: in the cooling area, a high-pressure water column (5 HP/caliber 3'/lift 23M) and a large-flow water column (600L/min) are uniformly sprayed to the surface of the sliding block through a multi-point spraying sleeve, the inside and the outside of the sliding block are uniformly cooled by force, and the sliding block enters a tempering station after being cooled; stopping cooling the high-pressure water column and the large-flow water body after the sliding block passes through the cooling zone;
s500, induction tempering heating: when the slide block continuously enters the tempering heating area, a second high-frequency current is immediately introduced into the induction coil of the tempering heating area to heat the to-be-processed induction position of the slide block to a second preset temperature, so that the tempering heating operation is completed, and then the slide block enters the tempering cooling area.
In some examples, the second high-frequency current in the induction tempering heating step may be 5KHz to 15KHz, for example, when specifically setting up, the second high-frequency current may be at a suitable frequency such as 5KHz, 7KHz, 10KHz, 12KHz or 15KHz, and specifically, the second high-frequency current may be selected according to a temperature required for actual tempering heating of the slider to be processed.
In some examples, the second preset temperature in the induction tempering heating step may be 150 ℃ to 250 ℃, for example, in a specific setting, the second preset temperature may be a suitable temperature such as 150 ℃, 160 ℃, 180 ℃, 200 ℃, 230 ℃ or 250 ℃, and the second preset temperature may be selected according to the actual tempering requirement of the slider to be processed.
In the embodiment of the application, the slider after high-frequency induction quenching is heated to a proper temperature and then slowly cooled to reduce or eliminate the internal stress in the quenched slider, the quenched slider is tempered in time, and the required mechanical property can be obtained through the matching of quenching and tempering.
S600, secondary high-pressure water column injection cooling: after the sliding block enters a tempering cooling area, a high-pressure water column (2 HP/caliber 1'/lift 40M) and a high-flow water column (140L/min) are uniformly sprayed on the surface of the sliding block through a multi-point spraying sleeve, and the inside and the outside of the sliding block are uniformly cooled in a forced mode; stopping cooling the high-pressure water column or the large-flow water body after the workpiece sliding block passes through the tempering and cooling area;
s700, cooling at normal temperature: and when the slide block is separated from the tempering cooling area, cooling at normal temperature.
In order to achieve the preset hardness and hardening layer of the sliding block, the first high-pressure water column jet cooling is cooling after quenching heating, water with a flow rate larger than that in the second high-pressure water column jet cooling after tempering heating is needed, the water temperature in the first high-pressure water column jet cooling and the water temperature in the second high-pressure water column jet cooling are both 15-35 ℃, and a water temperature cooling machine in equipment is used for controlling the temperature, so that after the sliding block passes through a cooling area, the surface temperature is below 35 ℃, and then natural cooling is carried out at the normal temperature of 23-27 ℃, for example, when the equipment is specifically set, the normal temperature can be suitable temperature of 23 ℃, 24 ℃, 25 ℃, 26 ℃ or 27 ℃.
In the embodiment of the application, carry out high-pressure water column spray cooling for the first time to the slider after quenching, carry out rapid cooling, slider cooling rate sets for the cooling curve of ideal according to the material of slider, shape and labour requirement, after the slider temperature drops to the temperature of setting for, carry the tempering station by circulating conveyor belt and carry out tempering treatment, can make the slider reach certain hardness, tempering treatment can eliminate the residual stress that produces when the slider quenches, prevent to warp and fracture, and can adjust the hardness, intensity, plasticity and toughness of slider, reach the performance requirement.
In some examples, an infrared temperature sensor is disposed on the slider surface for detecting a temperature of the slider surface.
Wherein, the infrared temperature sensor adopts an infrared thermometer.
In the embodiment of the application, the temperature of the surface of the sliding block can be known in real time through the arrangement of the infrared temperature sensor, so that the temperature of the induction coil can be regulated and controlled in time, and the required conditions for heat treatment of the sliding block are met.
The power supply for high-frequency induction heating of the induction coil has wide adjustable frequency and power range, and the heating rate and the heating depth of the sliding block are changed by adjusting the frequency and the power of the power supply.
The controller in the high-frequency induction quenching equipment can be a PID controller, and the PID controller is respectively electrically connected with the induction coil and the infrared temperature sensor, and is electrically connected with the flow sensor and other functional units on the multipoint injection sleeve. When the slide block is quenched by adopting a high-pressure water column and a large-flow water column, the PID controller can adjust the temperature and the pressure according to the data monitored by the infrared temperature sensor and the flow sensor in real time to realize the controllable cooling of the slide block.
The PID controller is a linear controller that performs process control based on an error e (t) = r (t) -c (t) of a set value r (t) and an actual output value c (t). In the embodiment, the surface temperature y (t) of the sliding block is taken as a control object, the surface temperature of the sliding block is measured in real time by an infrared temperature sensor, a measured value c (t) is fed back to a PID controller, the controller outputs an analog signal u (t) to the PID controller through PID adjusting operation according to an error value e (t), and the PID controller adjusts parameters such as the fluid speed influencing the heat transfer coefficient according to the output analog signal u (t).
One specific example of the novel linear guide rail processing method is given below:
annealing: placing a plurality of slide blocks to be processed in annealing equipment for annealing, wherein the annealing temperature is 500 ℃, annealing is carried out for 3 hours, and the slide blocks are transferred to a prepositioning station after annealing is finished;
pre-positioning: placing the annealed slide blocks on a circulating conveyor belt at a pre-positioning station, wherein the transmission speed of the circulating conveyor belt is 5mm/s, the interval between every two slide blocks is 50mm along the conveying direction of the circulating conveyor belt, aligning the to-be-processed areas of the slide blocks to the center of an induction coil in high-frequency induction quenching equipment, and preparing for induction quenching;
high-frequency induction heating: when a slide block on the circulating type conveying belt enters a continuous heating area, first high-frequency current is immediately introduced into an induction coil, the frequency of the first high-frequency current is 60KHz, the induction position to be processed of the slide block is heated to form a high-temperature area, redundant electromagnetic current generated in the heating process is guided to run off by the induction coil designed according to the outline of the area to be processed of the slide block, when the slide block is heated to 500 ℃, the thickness of a hardened layer on the surface of the slide block reaches 10mm, and subsequent cooling area cooling, tempering heating and normal temperature cooling are sequentially carried out.
Cooling by high-pressure water column injection for the first time: in the cooling area, high-pressure water columns (5 HP/caliber 3'/lift 23M) and high-flow water columns (600L/min) are uniformly sprayed on the surface of the sliding block through a multi-point spraying sleeve, the inside and the outside of the sliding block are cooled uniformly and forcibly until the temperature of the surface of the sliding block is lower than 35 ℃, and the sliding block enters a tempering station after cooling is completed;
induction tempering and heating: when the sliding block continuously enters a tempering heating area, immediately introducing a second high-frequency current into an induction coil of the tempering heating area, wherein the frequency of the second high-frequency current is 10KHz, heating the to-be-treated induction position of the sliding block to 200 ℃, completing the tempering heating operation, and then entering a tempering cooling area;
and (3) secondary high-pressure water column jet cooling: after the sliding block enters a tempering cooling area, a high-pressure water column (2 HP/caliber 1'/lift 40M) and a high-flow water column (140L/min) are uniformly sprayed to the surface of the sliding block through a multi-point spraying sleeve, and the inside and the outside of the sliding block are uniformly cooled by force until the temperature of the surface of the sliding block is lower than 35 ℃;
and (3) cooling at normal temperature: and when the slide block is separated from the tempering and cooling area, cooling at the normal temperature of 25 ℃.
The linear slider heating device can control the heating temperature and the heating time within a certain range, does not need a large amount of combustion heating medium, does not generate a large amount of waste gas, waste water and waste residues, achieves the effects of environmental protection and energy conservation, can achieve a continuous assembly line production mode, can improve the production efficiency of the linear slider, and reduces the production cost; the precise high-frequency induction quenching equipment is used, the temperature range is precisely controlled, and the technical index of the linear sliding block can be improved; through the design with induction coil's appearance according to linear slider, can lead except that unnecessary electric current, accurate control construction scope.
It should be noted that the numerical values and numerical ranges related to the embodiments of the present application are approximate values, and there may be a certain range of errors depending on the manufacturing process, and the error may be considered as negligible by those skilled in the art.
It is understood that a person skilled in the art can combine, split, recombine and the like the embodiments of the present application to obtain other embodiments on the basis of several embodiments provided by the present application, and the embodiments do not depart from the scope of the present application.
The above embodiments, objects, technical solutions and advantages of the embodiments of the present application are described in further detail, and it should be understood that the above embodiments are only specific embodiments of the present application and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of the embodiments of the present application.
Claims (10)
1. The slider induction heat treatment processing technology is characterized by comprising the following processing steps:
and (3) annealing: placing a plurality of sliders to be processed in annealing equipment for annealing, and transferring the sliders to a pre-positioning station after annealing;
pre-positioning: placing the annealed slide blocks on a circulating conveyor belt at a pre-positioning station, wherein a preset distance is formed between every two slide blocks along the conveying direction of the circulating conveyor belt, placing the to-be-processed areas of the slide blocks at an induction coil, and then preparing for induction quenching;
high-frequency induction heating: when the sliding block on the circulating type conveying belt enters a continuous heating area, a first high-frequency current is immediately introduced into the induction coil to heat an induction position to be processed of the sliding block to form a high-temperature area, redundant electromagnetic current generated in the heating process is guided to run off by the induction coil designed according to the outline shape of the area to be processed of the sliding block, the current outline of the area to be processed of the sliding block is matched with the inner outline shape and the outer outline shape of the induction coil, and when the sliding block is heated to reach a first preset temperature and surface thickness, subsequent cooling area cooling, tempering heating and normal-temperature cooling are sequentially carried out to form the processed sliding block.
2. The slider induction heat treatment machining process as claimed in claim 1, wherein the sequentially performing the subsequent cooling zone cooling, tempering heating and normal temperature cooling comprises:
first high-pressure water column jet cooling: in the cooling area, high-pressure water columns and high-flow water columns are uniformly sprayed to the surface of the sliding block through a multi-point spraying sleeve, the inside and the outside of the sliding block are uniformly cooled forcibly, and the sliding block enters a tempering station after being cooled;
induction tempering and heating: when the sliding block continuously enters a tempering heating area, immediately introducing a second high-frequency current into the induction coil of the tempering heating area, heating the to-be-processed induction position of the sliding block to a second preset temperature to complete tempering heating operation, and then entering a tempering cooling area;
and (3) secondary high-pressure water column jet cooling: after the sliding block enters the tempering and cooling area, high-pressure water columns and high-flow water columns are uniformly sprayed to the surface of the sliding block through a multi-point spraying sleeve, and the inside and the outside of the sliding block are forcedly and uniformly cooled;
and (3) cooling at normal temperature: and after the slide block is separated from the tempering cooling area, cooling at normal temperature.
3. The slider induction heat treatment machining process as claimed in claim 1 or 2, wherein the preset distance in the pre-positioning step is 50mm to 100mm.
4. The slide induction heat treatment processing process according to claim 1 or 2, wherein the conveying speed of the circulating conveyor belt in the pre-positioning step is 3mm/s to 10mm/s.
5. The slider induction heat treatment processing technology as claimed in claim 1 or 2, wherein the first preset temperature in the high-frequency induction heating step is 700 ℃ -800 ℃, and the surface thickness is 5mm-15mm.
6. The slider induction heat treatment processing technology as claimed in claim 1 or 2, wherein the annealing temperature in the annealing step is 450-550 ℃, and the annealing time is 3-4 h.
7. The slider induction heat treatment processing technique as claimed in claim 1 or 2, wherein said first high-frequency current in said high-frequency induction heating step is 55KHz to 65KHz.
8. The slider induction heat treatment process as claimed in claim 2, wherein the second high frequency current in the step of induction tempering heating is 5KHz to 15KHz.
9. The slider induction heat treatment machining process as claimed in claim 2, wherein the second preset temperature in the induction tempering heating step is 150 ℃ to 250 ℃.
10. The slider induction heat treatment machining process as claimed in claim 1 or 2, wherein an infrared temperature sensor is arranged on the surface of the slider and used for detecting the temperature of the surface of the slider.
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