An intelligent heat treatment furnace control system for a thin shift fork

Abstract

The present invention belongs to the technical field of production control for heat treatment of thin forks, and relates to an intelligent heat treatment furnace control system for thin forks, including a plurality of clamping fixtures corresponding to the shape of the forks located in the heat treatment furnace, a driver for driving the clamping fixtures to move, and a controller respectively connected to the clamping fixtures and the driver, the clamping fixtures are suspended at the bottom of the chain conveyor and dragged through the heat treatment furnace by the chain conveyor, and the controller obtains the real-time control parameters of the heat treatment and the deformation compensation control parameters and controls the heat treatment furnace to heat treat the forks based on them. The beneficial effects of the present invention are: by detecting the temperature of the clamping fixture, an accurate detection signal is provided for the control, and at the same time, the deformation compensation of the subsequent time is corrected by the deformation compensation result of the previous time point or the previous time period, so that the deformation compensation is continuously performed during the entire heat treatment process.

Description

Technical Field

[0001] The invention belongs to the technical field of production control of heat treatment of a thin shift fork, and in particular relates to an intelligent heat treatment furnace control system for a thin shift fork. Background Art

[0002] The thin shift fork involved in the present invention is a component of an automobile gearbox, connected to a shift handle, located at the lower end of the handle, and is used to shift the intermediate shift wheel to change the input-output speed ratio; the shift fork is a C-shaped flat plate-like part, and since the ratio of its thickness to its length is less than 0.15, it is prone to warping and deformation during heat treatment.

[0003] Chinese invention patent CN202410761092.9 belongs to the technical field of production control of heat treatment of thin forks, and relates to an intelligent heat treatment production line for thin forks and its control method, which obtains the material parameters of the workpiece; obtains the corresponding heat treatment parameters from the heat treatment sample database; constructs a heat treatment control database; obtains the initial heat treatment control parameters; constructs a heat treatment parameter control model based on the material parameters of the workpiece, the corresponding heat treatment parameters and the heat treatment control database; obtains the real-time deformation parameters of the workpiece during the heat treatment process to form a real-time deformation parameter set. The beneficial effects of the present invention are: providing real-time deformation parameters, real-time monitoring of the deformation state of the thin fork, and real-time correction based on the deformation correction data, which provides accurate data and effective improvement measures for fully improving the deformation of the thin fork during heat treatment.

[0004] In the process of implementing the above patent, the inventor found that in the process of collecting the deformation of the workpiece in the heat treatment furnace, it will be affected by the temperature of the heat treatment furnace and the fixture. When the temperature in the heat treatment furnace reaches the heat treatment requirements, the fixture is also heated at the same time, and the compensation of the fixture for the deformation of the workpiece will deviate from the designed theoretical value; it is generally believed that steel begins to lose its rigidity when the temperature exceeds 600 degrees; when the temperature exceeds the critical temperature, it will completely lose its rigidity; and some special alloy steels can maintain good rigidity at higher temperatures; for example, alloy steels of elements such as chromium and manganese can maintain good rigidity below 800 degrees; when the steel rigidity of the fixture is reduced, the clamping force of the fixture on the workpiece will change, and the measured strain value will change at this time, affecting the measurement of the deformation of the workpiece. At the same time, during the heat treatment process, due to the influence of the shape of the workpiece, when the workpiece is deformed, if only the end of the workpiece is supported and fixed, the middle part of the workpiece will still bend and deform. Summary of the invention

[0005] The goal to be achieved by the present invention is to solve the technical problem that in the process of collecting the deformation amount of the workpiece in the heat treatment furnace in the current Chinese invention patent CN202410761092.9 scheme, the measured strain value will be affected by the temperature of the heat treatment furnace and the fixture, thereby affecting the measurement of the workpiece deformation.

[0006] In order to achieve the above objectives, the present invention provides an intelligent heat treatment furnace control system for a thin shift fork.

[0007] The specific technical solution adopted by the present invention is:

[0008] An intelligent heat treatment furnace control system for a thin shift fork includes a plurality of clamping fixtures corresponding to the shape of the shift fork located in the heat treatment furnace, a driver for driving the clamping fixtures to move, and a controller respectively connected to the clamping fixtures and the driver. The clamping fixtures are suspended at the bottom of a chain conveyor and are dragged through the heat treatment furnace by the chain conveyor. The clamping fixtures are provided with a plurality of pressure detectors. The controller obtains real-time control parameters of heat treatment and deformation compensation control parameters and uses them as a basis to control the heat treatment furnace to perform heat treatment on the shift fork.

[0009] The controller uses the timestamp to accumulate and collect the real-time control parameters of the clamping fixture at different first time points in the heat treatment furnace, and obtains the historical control parameters of the clamping fixture at different time points in the heat treatment furnace;

[0010] Predicting the control of the clamping tooling at a second time point after the first time point, the temperature of the heating furnace, and the deformation compensation control parameters according to the historical control parameters, and obtaining the corresponding clamping tooling pre-clamping force, the pre-temperature of the heating furnace, and the deformation compensation pre-control parameters;

[0011] Determine the actual control parameter and the actual deformation compensation control parameter at the second time point in combination with the actual temperature of the clamping fixture, the pre-clamping force of the clamping fixture, the pre-temperature of the heating furnace and the deformation compensation pre-control parameter;

[0012] Acquire a deformation value of the shift fork after compensation control is performed according to the actual control parameter and the actual deformation compensation control parameter at the second time point;

[0013] Obtaining a gain coefficient of the deformation parameter according to the deformation value of the shift fork after the compensation control and the actual deformation compensation control parameter;

[0014] The gain coefficient is compensated to the actual deformation compensation control parameter formed according to the parameter at the second time point to form the actual deformation compensation control parameter for controlling the third time point.

[0015] Furthermore, the real-time control parameters include the driving force of the driver on the clamping tooling, the deformation parameters of the fork, and the temperature inside the clamping tooling according to the real-time heating temperature;

[0016] The historical control parameters refer to the real-time control parameters detected by the shift fork during the time that the shift fork has been heat treated in the heat treatment furnace;

[0017] The deformation compensation pre-control parameter is the difference between the deformation parameter of the shift fork and the corresponding parameter when the shift fork is not deformed.

[0018] Furthermore, the control of the clamping tooling at a second time point after the first time point, the temperature of the heating furnace and the deformation compensation control parameters are predicted based on the historical control parameters, and the corresponding clamping tooling pre-clamping force, the pre-temperature of the heating furnace and the deformation compensation pre-control parameters are obtained, including:

[0019] Perform aggregate analysis on historical control parameters to obtain the average value, maximum value and minimum value of the historical control parameters;

[0020] Calculate the difference TA between the maximum value of the historical control parameter and the average value of the historical control parameter, the difference TB between the minimum value of the historical control parameter and the average value of the historical control parameter, and the difference TC between other historical control parameters and the average value;

[0021] When the TC value is less than four-fifths of TA or TB, and more than four-fifths of TCs are less than four-fifths of TA or TB, TC is used as a reference value for adjusting the pre-clamping force of the clamping tooling, the pre-temperature of the heating furnace and the pre-control parameters of the deformation compensation to determine the actual clamping force of the tooling, the actual heating temperature of the heating furnace and the actual deformation compensation control parameters.

[0022] Furthermore, when the temperature inside the clamping tool exceeds the allowable temperature detected by the strain gauge, the cooling device of the clamping tool is activated to cool the inside of the clamping tool.

[0023] Furthermore, the product of the gain coefficient and TC is used as the reference value.

[0024] Furthermore, based on the deformation value of the fork after the compensation control and the actual deformation compensation control parameter, a gain coefficient of the deformation parameter is obtained, specifically, the difference between the deformation value of the fork after the compensation control and the actual deformation compensation control parameter, and the difference M is obtained. The ratio of the difference M to the actual deformation compensation control parameter at that time point is used as the gain coefficient of the deformation parameter.

[0025] The positive effect of the present invention is: by detecting the temperature of the clamping tooling, combining the actual temperature of the clamping tooling, the pre-clamping force of the clamping tooling, the pre-temperature of the heating furnace and the deformation compensation pre-control parameters, the actual control parameters and the actual deformation compensation control parameters at the second time point are determined, and accurate detection signals are provided for control. At the same time, the deformation compensation results of the previous time point or the previous time period are used to correct the deformation compensation at subsequent times, so that the deformation compensation is carried out continuously throughout the heat treatment process, thereby solving the technical problem that in the scheme of the current Chinese invention patent CN202410761092.9, during the collection of the deformation amount of the workpiece in the heat treatment furnace, the measured strain value will be affected by the temperature of the heat treatment furnace and the fixture, thereby affecting the measurement of the workpiece deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a flow chart of a control method of an intelligent heat treatment furnace control system for a thin shift fork in the present invention;

[0027] Figure 2 In a control method of an intelligent heat treatment furnace control system for a thin shift fork in the present invention, the control of a clamping tool at a second time point after a first time point, the temperature of a heating furnace and a flow chart of deformation compensation pre-control parameters are predicted based on historical control parameters to obtain corresponding clamping tool pre-clamping force, heating furnace pre-temperature and deformation compensation pre-control parameters;

[0028] Figure 3 It is a schematic diagram of the structure of a heat treatment production line used in a control system of an intelligent heat treatment furnace for a thin shift fork in the present invention;

[0029] Figure 4 yes Figure 3 A cross-sectional view of a schematic structural diagram of a heat treatment production line to which a control system of an intelligent heat treatment furnace for a thin shift fork of the present invention is applied;

[0030] Figure 5 This is a schematic diagram of the first structure of a clamping tool in a control system of an intelligent heat treatment furnace of a thin shift fork in the present invention;

[0031] Figure 6 This is a second structural schematic diagram of a clamping tool in a control system of an intelligent heat treatment furnace of a thin shift fork in the present invention;

[0032] Figure 7 It is a structural schematic diagram of a deformation detection device in a clamping tooling in a control system of an intelligent heat treatment furnace of a thin shift fork in the present invention;

[0033] Legend: 1—first motor, 2—first chain conveyor, 3—second motor, 4—second chain conveyor, 5—second guide plate, 6—insulating furnace, 601—padlock, 602—hanging rod, 603—furnace wall, 604—first thin plate, 605—first drive cylinder, 606—second drive cylinder, 607—third drive cylinder, 608—second thin plate, 609—third thin plate, 6091—first clamping block, 6092—second clamping block, 6093—third clamping block, 6094—fourth clamping block, 6095—fifth clamping block, 6096—first fixing seat, 6097—first supporting seat, 6098—cylindrical connector, 6099—second supporting seat, 60910—strain gauge base head, 60911—strain gauge base , 60912—data line, 60913—fixed base, 60914—fixing bolt, 60915—aluminum silicate refractory fiber layer, 60916—pressure plate, 60917—aluminum silicate refractory fiber column, 60918—notch, 60919—aluminum silicate refractory fiber fixing seat, 610—first detector, 611—first clamp, 612—second clamp, 613—second detector, 614—fourth drive cylinder, 615—fifth drive cylinder, 616—sixth drive cylinder, 6161—first connecting plate, 6162—second connecting plate, 6163—third connecting plate, 617—connecting thin plate, 618—clamp, 7—first guide plate, 8—heating furnace. DETAILED DESCRIPTION

[0034] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following is a detailed description of the specific implementation method, structure, characteristics and effects of an intelligent heat treatment furnace control system for a thin fork proposed in accordance with the present invention, in combination with the accompanying drawings and embodiments.

[0035] In the following description, different references to "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, particular features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0036] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0037] The acquisition, storage, use, and processing of data in the technical solution of the present invention are in compliance with the relevant provisions of national laws and regulations.

[0038] The present application is applicable to the intelligent control of heat treatment deformation of mass-produced thin shift forks and the improvement of the corresponding heat treatment production line. In order to solve the technical problem that in the scheme of the current Chinese invention patent CN202410761092.9, during the collection of the deformation amount of the workpiece in the heat treatment furnace, the measured strain value will be affected by the temperature of the heat treatment furnace and the fixture, causing the measured strain value to change, thereby affecting the measurement of the workpiece deformation, the following specifically describes an intelligent heat treatment furnace control system for a thin shift fork provided by the present invention in conjunction with the accompanying drawings.

[0039] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0040] like Figures 1 to 7 As shown, an intelligent heat treatment furnace control system for a thin fork is applied to the intelligent control of heat treatment deformation of thin forks in batch production and the corresponding heat treatment production line. The intelligent heat treatment production line includes:

[0041] The heating furnace 8 is used to heat the thin fork. A through slot is provided on the top of the heating furnace 8 for the first chain conveyor 2 to pull the workpiece through the heating furnace 8. Three thin plates are symmetrically provided on the two side walls of the heating furnace 8, namely, a first thin plate 604, a second thin plate 608 and a third thin plate 609. The thin plates are driven by a motor or a hydraulic station.

[0042] The insulation furnace 6 is used to insulate the thin fork. A through slot is provided on the top of the insulation furnace 6 for the second chain conveyor 4 to pull the workpiece through the insulation furnace 6. The two side walls of the insulation furnace 6 are also symmetrically provided with three thin plates, namely, a first thin plate 604, a second thin plate 608 and a third thin plate 609. The thin plates are driven by a motor or a hydraulic station.

[0043] The conveyor includes a first chain conveyor 2 that drives the suspended thin fork to pass through the heating furnace, and a second chain conveyor 4 that drives the suspended thin fork to pass through the insulation furnace;

[0044] A plurality of clamping fixtures are provided, which are suspended on the first chain conveyor 2 and the second chain conveyor 4. The clamping fixtures correspond to the shape of the shift forks and are provided with three pairs of pressure detectors;

[0045] The control system includes a temperature detection module arranged on the heating furnace, a speed detection module arranged on the conveyor, a pressure acquisition module and a data processing module arranged on the pressure detector; the temperature detection module, the speed detection module and the pressure acquisition module are all individually connected to the data processing module.

[0046] The temperature detection module is used to obtain the heating temperature Mn, the speed detection module is used to obtain the conveying speed Vn, and the pressure acquisition module is used to obtain the pressure value Yn generated during the deformation of the calculated deformation parameter En.

[0047] Among them, in order to facilitate the adjustment of the different conveying speeds of the workpieces in the heating furnace and the holding furnace, the intelligent heat treatment production line is provided with two conveyors, namely the first chain conveyor 2 and the second chain conveyor 4. The chain conveyor in this embodiment can facilitate the hanging and disassembly of the workpieces. This improvement is relative to the plate chain conveyor;

[0048] The first chain conveyor 2 is driven by a first motor 1; the second chain conveyor 4 is driven by a second motor 3;

[0049] The first chain conveyor 2 is provided with a first guide plate 7, and the first guide plate 7 passes through the heating furnace 8; the second chain conveyor 4 is provided with a second guide plate 5; the second guide plate 5 passes through the insulation furnace 6; the second guide plate 5 and the first guide plate 7 are made of rigid materials, preferably steel, and when the first chain conveyor 2 conveys the workpiece into the heating furnace 8, the first guide plate 7 guides and positions the clamping tooling suspended below the first chain conveyor 2, and when the second chain conveyor 4 conveys the workpiece into the insulation furnace 6, similarly, the second guide plate 5 guides and positions the clamping tooling suspended below the second chain conveyor 4;

[0050] A plurality of padlocks 601 are evenly arranged at the bottom of the conveying tracks of the first chain conveyor 2 and the second chain conveyor 4. A hanging rod 602 is hung on each padlock 601. A clamping tool is movably connected to the bottom of the hanging rod 602. The clamping tool in this embodiment is a clamp 618. The clamp 618 includes three pairs of clamp blocks and three pairs of connecting thin plates 617. Figure 5 and Figure 6 The double-dotted line in FIG. 1 shows the structural form of the thin shift fork of the heat treatment target workpiece applicable to the present invention.

[0051] Figure 5 The middle one is a first structural form of the clamping tool, wherein the three pairs of clamping blocks are respectively a first clamping block 6091 and a third clamping block 6093 for clamping the open end of the thin fork, and a second clamping block 6092 for clamping the unopened end of the thin fork;

[0052] The first clamping block 6091, the third clamping block 6093, and the second clamping block 6092 have the same structural style, but different sizes. The shape of the clamping parts is also adaptively changed according to the specific shape of the thin fork, and the coverage of the clamping block to the fork is also adaptively changed according to the actual requirements of the workpiece to meet the requirements of local heat treatment.

[0053] Taking the first clamp 6091 as an example to illustrate the structure of the clamp, the first clamp 6091 is provided with a first clamp plate 611 and a second clamp plate 612, the first clamp plate 611 and the second clamp plate 612 are used to clamp the end of the thin fork, a first detector 610 is fixed to the back of the first clamp plate 611, and a second detector 613 is fixed to the back of the second clamp plate 612, the first detector 610 and the second detector 613 have the same structure and function, and the only difference is that the measured positions are different, the first detector 610 and the second detector 613 are both integrated with a temperature detection module and a pressure detector, as well as a data processing module, and are connected to the control system of the production line via Bluetooth, the first detector 610 and the second detector 613 are encapsulated by a heat insulating material and fixed on the back of the first clamp plate 611 and the second clamp plate 612, and the heat insulating material is recommended to be ceramic fiber or asbestos, and the first detector 610 and the second detector 613 are encapsulated in a multi-layer spaced arrangement.

[0054] Specifically, Figure 7As shown, the deformation parameters or deformation values ​​of the shift fork are collected and obtained by measuring the pressure value on the sensor when the shift fork is deformed. The specific structure of the sensor includes a shell made of a heat-insulating aluminum silicate refractory fiber layer 60915. Taking the first clamping block 6091 as an example, the shell is fixed on the side of the first clamping block 6091 close to the shift fork, and a pressure plate 60916 is fixed on the outside of the shell to withstand the pressure of the first clamping block 6091 on the shift fork deformation compensation. The pressure plate 60916 is provided with a notch 60918 in the middle to accommodate and guide the aluminum silicate refractory fiber column 60917. The aluminum silicate refractory fiber column 60917 The end is higher than the top of the pressure plate 60916, and the distance difference is A. The other end of the aluminum silicate refractory fiber column 60917 is a spherical end head, and the spherical end head is movably connected with the aluminum silicate refractory fiber fixing seat 60919. The bottom of the aluminum silicate refractory fiber fixing seat 60919 is bolted to the first fixing seat 6096. The bottom of the first fixing seat 6096 is provided with a first support seat 6097. The bottom of the first support seat 6097 is connected to the strain gauge base 69011 through a spherical connector. The strain gauge base 69011 is pasted with a strain gauge. When the fork is deformed, the force generated by the deformation acts on the silicon The end of the alumina silicate refractory fiber column 60917 passes through the alumina silicate refractory fiber fixing seat 60919, the first fixing seat 6096 and the first supporting seat 6097 to the strain gauge base 69011, so that the strain gauge base 69011 is deformed, and then the strain gauge changes, and the detection signal and the temperature signal in the sensor are transmitted to the controller through the data line 60912. The two ends of the strain gauge base 69011 are cylindrical strain gauge base heads 60910 with grooves. The strain gauge base head 60910 is symmetrically inserted at the bottom of the symmetrically arranged second supporting seat 6099. The second supporting seat 60 99 is suspended in the third support seat by a pin shaft, and the third support seat is fixed to the top surface of the fixed base 60913 by a fixing bolt 60914, and the fixed base 60913 is fixed to the inner side of the aluminum silicate refractory fiber layer 60915; the aluminum silicate refractory fiber layer 6091 wraps and packages the strain gauge for heat insulation, ensuring that the strain gauge can be normally detected in a high-temperature environment, and at the same time, the aluminum silicate refractory fiber column 60917 and the aluminum silicate refractory fiber fixing seat 60919 are in contact with the shift fork, avoiding the contact between the strain gauge and the high-temperature shift fork, and further ensuring that the strain gauge can be normally detected in a high-temperature environment.

[0055] Figure 6 The second structural form of the clamping tool is shown in the figure. Compared with the first structural form, the second structural form is that the fifth clamping block 6095 is provided in the middle of the third connecting plate 6163, and the fourth clamping block 6094 is provided on the second connecting plate. The first clamping block 6091, the second clamping block 6092, the third clamping block 6093, the fourth clamping block 6094 and the fifth clamping block 6095 are all provided with Figure 7The sensor shown in; the first clamp block 6091, the second clamp block 6092, and the third clamp block 6093 are used to detect and correct the deformation of the three ends of the fork; the fourth clamp block 6094 and the fifth clamp block 6095 are used to detect and correct the deformation between the two connecting walls of the fork.

[0056] In this embodiment:

[0057] The first clamping block 6091 is movably connected to the first thin plate 604, the second clamping block 6092 is movably connected to the second thin plate 608, and the third clamping block 6093 is movably connected to the third thin plate 609; when the first driving cylinder 605 drives the first thin plate 604 to move, it drives the first clamping block 6091 to move to compensate for the deformation of the end of the correction fork; similarly, when the second driving cylinder drives the second thin plate to move, it drives the second clamping block to move to compensate for the deformation of the end of the correction fork; when the third driving cylinder drives the third thin plate to move, it drives the third clamping block to move to compensate for the deformation of the end of the correction fork;

[0058] Similarly, when the second structural form of the clamping tool is used, two thin plates need to be added to drive the fourth clamping block 6094 and the fifth clamping block 6095 to move respectively.

[0059] In this embodiment:

[0060] The control system includes a plurality of clamping fixtures corresponding to the shape of the shift fork located in the heat treatment furnace, a driver for driving the clamping fixture to move, and a controller respectively connected to the clamping fixture and the driver. The clamping fixture is suspended at the bottom of the chain conveyor and is dragged through the heat treatment furnace by the chain conveyor. The clamping fixture is provided with a plurality of pressure detectors. The controller obtains the real-time control parameters of the heat treatment and the deformation compensation control parameters and controls the heat treatment furnace to perform heat treatment on the shift fork based on the obtained parameters. The control method includes:

[0061] S100: The controller uses the timestamp to accumulate and collect the real-time control parameters of the clamping tool at different first time points in the heat treatment furnace to obtain the historical control parameters of the clamping tool at different time points in the heat treatment furnace;

[0062] S200: predicting the control of the clamping tool at a second time point after the first time point, the temperature of the heating furnace, and the deformation compensation control parameters according to the historical control parameters, and obtaining the corresponding clamping tool pre-clamping force, the pre-temperature of the heating furnace, and the deformation compensation pre-control parameters;

[0063] S210: Predicting the control of the clamping tooling at a second time point after the first time point, the temperature of the heating furnace, and the deformation compensation control parameters according to the historical control parameters, and obtaining the corresponding clamping tooling pre-clamping force, the pre-temperature of the heating furnace, and the deformation compensation pre-control parameters include:

[0064] S211: performing aggregate analysis on the historical control parameters to obtain the average value, maximum value and minimum value of the historical control parameters;

[0065] S212: Calculate the difference TA between the maximum value of the historical control parameter and the average value of the historical control parameter, the difference TB between the minimum value of the historical control parameter and the average value of the historical control parameter, and the difference TC between other historical control parameters and the average value;

[0066] S213: When the TC value is less than four-fifths of TA or TB, and more than four-fifths of the TCs are less than four-fifths of TA or TB, TC is used as a reference value for adjusting the pre-clamping force of the clamping tooling, the pre-temperature of the heating furnace and the pre-control parameters of the deformation compensation to determine the actual clamping force of the tooling, the actual heating temperature of the heating furnace and the actual deformation compensation control parameters.

[0067] S300: Determine the actual control parameter and the actual deformation compensation control parameter at the second time point in combination with the actual temperature of the clamping tool, the pre-clamping force of the clamping tool, the pre-temperature of the heating furnace and the deformation compensation pre-control parameter;

[0068] S400: Acquire a deformation value of the shift fork after compensation control is performed according to the actual control parameter and the actual deformation compensation control parameter at the second time point;

[0069] S500: obtaining a gain coefficient of the deformation parameter according to the deformation value of the shift fork after the compensation control and the actual deformation compensation control parameter;

[0070] S600: Compensating the gain coefficient to the actual deformation compensation control parameter formed according to the parameter at the second time point to form the actual deformation compensation control parameter for controlling the third time point.

[0071] The real-time control parameters include the driving force of the driver on the clamping tooling, the deformation parameters of the fork, and the temperature inside the clamping tooling according to the real-time heating temperature;

[0072] The historical control parameters refer to the real-time control parameters detected by the shift fork during the time that the shift fork has been heat treated in the heat treatment furnace;

[0073] The deformation compensation pre-control parameter is the difference between the deformation parameter of the shift fork and the corresponding parameter when the shift fork is not deformed.

[0074] When the temperature inside the clamping tool exceeds the allowable temperature for strain gauge detection, the cooling device of the clamping tool is activated to cool the inside of the clamping tool.

[0075] The product of the gain coefficient and TC is used as the reference value.

[0076] According to the deformation value of the fork after the compensation control and the actual deformation compensation control parameter, the gain coefficient of the deformation parameter is obtained, specifically, the difference between the deformation value of the fork after the compensation control and the actual deformation compensation control parameter, the difference M is obtained, and the ratio of the difference M to the actual deformation compensation control parameter at that time point is used as the gain coefficient of the deformation parameter.

[0077] The heating furnace 8 and the holding furnace 6 are symmetrically provided with a plurality of drive cylinders, such as Figure 4 As shown, the driving cylinders are divided into three groups, the first driving cylinder 605 and the sixth driving cylinder 616 are the first group, the second driving cylinder 606 and the fifth driving cylinder 615 are the second group, and the third driving cylinder 607 and the fourth driving cylinder 614 are the third group, wherein each group of driving cylinders is evenly distributed with a plurality of driving cylinders in a straight line, and the movable rods of each group of driving cylinders penetrate the furnace wall 603 and are fixed to the corresponding thin plates at the same time, the first group of driving cylinders is fixed to the first thin plate 604, the second group of driving cylinders is fixed to the second thin plate 608, and the third group of driving cylinders is fixed to the third thin plate 609; the driving cylinders are preferably oil cylinders or air cylinders; the first thin plate 604, the second thin plate 608, and the third thin plate 609 are all arranged in pairs and pass through the inlet and outlet of the heating furnace or the insulation furnace; the first thin plate 604 is in contact with the first clamping block 6091, the second thin plate 608 is in contact with the second clamping block 6092, and the third thin plate 609 is in contact with the third clamping block 6093.

[0078] The foregoing has broadly outlined some aspects and features of various embodiments, which should be construed as merely illustrative of various potential applications. Other beneficial results may be obtained by applying the disclosed information in different ways or by combining various aspects of the disclosed embodiments. Other aspects and a more comprehensive understanding may be obtained by reference to the detailed description of the exemplary embodiments in conjunction with the accompanying drawings, within the scope defined by the claims.

[0079] The above embodiments have been described in detail. Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, reductions, and substitutions made by relevant technicians within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. An intelligent heat treatment furnace control system for a thin shift fork, comprising a plurality of clamping fixtures corresponding to the shape of the shift fork located in the heat treatment furnace, a driver for driving the clamping fixture to move, and a controller respectively connected to the clamping fixture and the driver, the clamping fixture is suspended at the bottom of a chain conveyor and is dragged through the heat treatment furnace by the chain conveyor, the clamping fixture is provided with a plurality of pressure detectors, the controller obtains real-time control parameters of heat treatment and deformation compensation control parameters and controls the heat treatment furnace to perform heat treatment on the shift fork based on the obtained parameters, and is characterized in that: The controller uses the timestamp to accumulate and collect the real-time control parameters of the heat treatment of the clamping fixture at different first time points in the heat treatment furnace, and obtains the historical control parameters of the clamping fixture at different time points in the heat treatment furnace; Predicting the control of the clamping tooling at a second time point after the first time point, the temperature of the heating furnace, and the deformation compensation control parameters according to the historical control parameters, and obtaining the corresponding clamping tooling pre-clamping force, the pre-temperature of the heating furnace, and the deformation compensation pre-control parameters; Determine the heat treatment real-time control parameter and the actual deformation compensation control parameter at the second time point in combination with the actual temperature of the clamping fixture, the pre-clamping force of the clamping fixture, the pre-temperature of the heating furnace and the deformation compensation pre-control parameter; Acquire a deformation value of the shift fork after compensation control is performed according to the real-time control parameter of the heat treatment at the second time point and the actual deformation compensation control parameter; Obtaining a gain coefficient of the deformation parameter according to the deformation value of the shift fork after the compensation control and the actual deformation compensation control parameter; Compensating the gain coefficient to the actual deformation compensation control parameter formed according to the parameter at the second time point to form the actual deformation compensation control parameter for controlling the third time point; The real-time control parameters of the heat treatment include the driving force of the driver on the clamping tooling, the deformation parameters of the fork, and the temperature inside the clamping tooling according to the real-time heating temperature; The historical control parameters refer to the real-time control parameters of the heat treatment detected by the shift fork during the time that the heat treatment has been carried out in the heat treatment furnace; The deformation compensation pre-control parameter is the difference between the fork deformation parameter and the corresponding parameter when the fork is not deformed; According to the deformation value of the fork after the compensation control and the actual deformation compensation control parameter, the gain coefficient of the deformation parameter is obtained, specifically, the difference between the deformation value of the fork after the compensation control and the actual deformation compensation control parameter, the difference M is obtained, and the ratio of the difference M to the actual deformation compensation control parameter at that time point is used as the gain coefficient of the deformation parameter.

2. According to claim 1, a thin fork intelligent heat treatment furnace control system is characterized in that: According to the historical control parameters, the control of the clamping tool at the second time point after the first time point, the temperature of the heating furnace and the deformation compensation control parameters are predicted to obtain the corresponding clamping tool pre-clamping force, the pre-temperature of the heating furnace and the deformation compensation pre-control parameters, including: Perform aggregate analysis on historical control parameters to obtain the average value, maximum value and minimum value of the historical control parameters; Calculate the difference TA between the maximum value of the historical control parameter and the average value of the historical control parameter, the difference TB between the minimum value of the historical control parameter and the average value of the historical control parameter, and the difference TC between other historical control parameters and the average value; When the TC value is less than four-fifths of TA or TB, and more than four-fifths of TCs are less than four-fifths of TA or TB, TC is used as a reference value for adjusting the pre-clamping force of the clamping tooling, the pre-temperature of the heating furnace and the pre-control parameters of the deformation compensation to determine the actual clamping force of the tooling, the actual heating temperature of the heating furnace and the actual deformation compensation control parameters.

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