Complete equipment for local induction quenching of screws

Abstract

The invention discloses local induction quenching equipment for screws, relates to the technical field of machining heat treatment equipment, and aims to solve the problems of poor adaptability, low automation degree and lack of quality monitoring of existing equipment. The equipment is of an integrated mechanical and electrical integrated structure, is matched with M8-M12 screws with gaskets or without gaskets, and comprises a multi-station cooperative mechanism, an induction heating system, an automatic feeding, discharging and sorting system and an electric appliance control system, a metal oxide semiconductor field effect transistor (MOSFET) induction power supply system achieves local high-frequency heating of the screws through a special inductor, and a cooling system synchronously sprays water for cooling; and the electrical appliance control system monitors process parameters in real time, defective products are automatically removed when the process parameters are abnormal, and qualified screws are separated through the pneumatic discharging and sorting mechanism. The equipment has the functions of graded password management, three-month historical data storage and regular maintenance reminding, automatic and high-precision quenching of screws of multiple specifications can be achieved, and the production efficiency and the product quality stability are improved.

Description

Technical Field

[0001] This invention relates to the field of mechanical processing and heat treatment equipment technology, specifically a complete set of equipment for local induction hardening of screws. Background Technology

[0002] As a core component of mechanical connections, screws require localized hardening of their heads and critical load-bearing areas to enhance hardness and wear resistance, ensuring connection reliability. Existing screw hardening equipment suffers from the following technical deficiencies:

[0003] Poor specification adaptability: Most equipment can only process screws of a single specification. When changing to screws of different specifications from M8 to M12 or with / without washers, the core mechanism needs to be disassembled and adjusted, which is time-consuming and inefficient, making it difficult to meet the needs of mass production of multiple varieties.

[0004] Insufficient automation: The processes of feeding, workpiece posture detection, and defective product sorting rely on manual operation, which not only increases labor costs but also makes it easy for human error to cause fluctuations in processing accuracy and a high defect rate.

[0005] Lack of process monitoring: There is a lack of real-time recording and abnormal warning of heating power, quenching fluid parameters and processing quantity, making it impossible to trace processing data, and maintenance reminders are not timely, which can easily affect product quality due to abnormal equipment status;

[0006] Poor coordination: The lack of precise linkage control between the induction power supply, quenching machine tool and cooling system, and the low timing matching degree between high frequency heating and water spray cooling result in inconsistent screw hardening layer depth and poor product quality stability.

[0007] To address these issues, the present invention provides a complete set of equipment for local induction hardening of screws. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a complete set of equipment for local induction hardening of screws, which solves the aforementioned problems.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a screw local induction hardening device, comprising an integrated electromechanical system, the device comprising at least a multi-station collaborative mechanism for continuous screw hardening, an induction heating system, an automatic loading and unloading and sorting system, and an electrical control system for controlling the coordinated operation of each system; the multi-station collaborative mechanism drives the screws to sequentially complete the loading, positioning, heating, cooling, detection and unloading processes; the induction heating system comprises a MOSFET induction power supply system and an induction load system, the MOSFET induction power supply system employing high-frequency resonance technology to achieve localized rapid heating of the screws; the automatic loading and unloading and sorting system comprises a vibration sorting mechanism for orienting and sorting the screws, a position detection mechanism for detecting the screw posture, and a sorting mechanism for determining and separating qualified / unqualified products based on processing parameters; the device is compatible with M8-M12 bolts with / without washers, and the workpiece length range is 15-90mm, with a maximum outer diameter of 40mm for the head flange gasket.

[0010] Preferably, the multi-station collaborative mechanism includes a multi-station dedicated quenching machine tool and an indexing plate; the multi-station dedicated quenching machine tool adopts a welded bed and includes a lifting mechanism for adjusting the induction heating position, a transfer transmission mechanism for driving the workpiece to move, and a stainless steel water tank for collecting coolant; the indexing plate supports 8-64 equal divisions, and the workpiece is driven to pass through each station in sequence by advancing through the indexing, and has a workpiece installation in place recognition function.

[0011] Preferably, in the lifting mechanism of the multi-station dedicated quenching machine tool, the transformer lifting stroke is 150mm; the transfer transmission mechanism includes a transfer turntable with a diameter of φ350mm, with 16 stations, and the workpiece quenching moving speed is 1m / min; the workpiece rotation is driven by an AC geared motor frequency converter; the multi-station dedicated quenching machine tool works in conjunction with the MOSFET induction power supply system, and has the function of high-frequency heating and water spray cooling linkage control; when an abnormality is detected, defective products are automatically rejected.

[0012] Preferably, the electrical control system adopts a PLC, a touch screen and a servo motor as the control core, and has a hierarchical password management function; it can set the upper and lower limits of heating time, cooling time, output power and quenching fluid parameters, and can store at least 3 months of historical processing data and provide regular maintenance reminders; it is equipped with overcurrent, low water pressure, over-temperature protection and ±7% input voltage alarm functions, and has a reserved MES interface and supports HTTP communication protocol.

[0013] Preferably, the MOSFET induction power supply system has a rated power of 30KW, an operating frequency of over 100KHz, an input capacity of 36KVA, and is compatible with a three-phase 380V 50Hz input line; it includes a rectifier, a DC filter unit, an inverter power unit, and an RLC series resonant tank circuit, adopts FPGA fully digital control, and has SPDM power regulation and short-circuit protection functions; it is cooled by pure water, with a cooling water inlet temperature range of 5-35℃ and an inlet water pressure of 0.18-0.25Mpa.

[0014] Preferably, the inductive load system includes a two-dimensional direction adjustment mechanism and a quenching inductor with a quick-change interface; the horizontal adjustment range of the two-dimensional direction adjustment mechanism is 100mm, and it is controlled by a touch screen; the conductive busbar and induction coil of the quenching inductor are provided with axial limiting and longitudinal fine-tuning structures to ensure repeatability and positioning accuracy, and a set of dedicated inductors is included.

[0015] Preferably, the vibratory feeding mechanism is a vibratory feeding mechanism, which includes a vibratory plate with a diameter of 650mm. The vibratory plate drives the screw to discharge material clockwise in a predetermined direction through electromagnetic vibration. It is equipped with a jamming and material shortage alarm function and works in conjunction with the position detection mechanism to complete the feeding.

[0016] Preferably, the position detection mechanism is an overlap and position detection mechanism, located between the vibrating feeding mechanism and the indexing plate, used to detect the overlap state and position deviation of the screws, and to issue an alarm and suspend the conveying when an abnormality is detected.

[0017] Preferably, the automatic loading, unloading and sorting system further includes a pneumatic workpiece unloading mechanism, a falling channel and a discharge conveying mechanism; the pneumatic workpiece unloading mechanism sends the processed screws through the falling channel to the discharge conveying mechanism, which then conveys them to the qualified product sorting mechanism.

[0018] Preferably, the induction heating system further includes a quenching device, which comprises a quenching inductor and a power supply / workpiece cooling system; the quenching inductor has a flame chamber and is driven by a CNC servo motor to achieve up-and-down movement; the cooling system has a cooling capacity of 26380 kcal / h (8P) and a cold water volume of 4 m³ / h. 3 / h, equipped with quenching fluid parameter monitoring function.

[0019] Beneficial effects

[0020] This invention provides a complete set of equipment for local induction hardening of screws. Compared with the prior art, it has the following advantages:

[0021] 1. This complete set of screw local induction hardening equipment has significant advantages in adaptability and production efficiency. It can cover M8-M12 screws with or without washers (workpiece length 15-90mm, maximum outer diameter of head flange gasket 40mm). When changing specifications, only the corresponding process parameters and simple accessories need to be selected. There is no need to disassemble the core mechanism. It integrates the entire process of automatic feeding, positioning, heating, cooling and sorting. The quenching cycle is about 4s / piece, which greatly reduces manual intervention, meets the needs of multi-variety batch production, improves production efficiency and reduces labor costs.

[0022] 2. This complete set of screw local induction hardening equipment achieves precise local heating of screws through a MOSFET induction power supply system (rated power 30KW, frequency above 100KHz). It is equipped with an induction load system with repeatability and an electrical control system with real-time monitoring. It can track key indicators such as heating power and quenching fluid parameters in real time. When the limit is exceeded, it will automatically alarm and reject defective products. The equipment has multiple protection functions such as overcurrent, low water pressure, and overtemperature. Historical processing data can be stored for at least 3 months, which ensures stable product quality, extends the service life of the equipment, and reduces maintenance costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a perspective view of the external structure of the present invention;

[0025] Figure 2 This is a side perspective view of the present invention;

[0026] Figure 3 This is a side view of the structure of the present invention;

[0027] Figure 4 This is the main structural view of the present invention.

[0028] In the diagram: 1. Overall equipment; 2. Multi-station dedicated quenching machine tool; 3. Electrical control system; 4. MOSFET induction power supply system; 5. Induction load system; 6. Vibration feeding mechanism; 7. Discharge conveying mechanism; 8. Overlapping and position detection mechanism; 9. Indexing plate; 10. Pneumatic workpiece unloading mechanism; 11. Drop channel; 12. Qualified product sorting mechanism; 13. Quenching inductor; 14. Quenching device. Detailed Implementation

[0029] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0030] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0031] Reference Figures 1 to 4 This application provides a screw local induction hardening device, which adopts an integrated electromechanical structure. Its core includes four main modules: a multi-station collaborative mechanism, an induction heating system, an automatic loading and unloading and sorting system, and an electrical control system. Each module works collaboratively based on a preset program. The specific technical solution is as follows:

[0032] 1. Overall equipment compatibility and basic configuration

[0033] The equipment features an integrated electromechanical structure, and its compatibility with various workpieces strictly adheres to the technical agreement requirements.

[0034] Compatible screw sizes: M8-M12 bolts with or without washers;

[0035] Compatible workpiece lengths: 15-70mm (M8 and some M10 screws), 20-90mm (M10 and M12 screws);

[0036] Maximum outer diameter of head flange gasket: 30mm (M8 screw), 40mm (M10, M12 screw);

[0037] Equipment Appearance: The outer frame is gray-white (color code RAL9002), the height is 195±5cm (not exceeding 2 meters), the upper part of the outer shell has transparent windows on the front, back, left and right, the gap between doors and between doors and frame is ≤5mm, the whole has a protective cover, no sharp corners or edges, and meets the requirements for safe operation.

[0038] 2. Multi-station collaborative mechanism

[0039] The multi-station collaborative mechanism is the core of realizing the continuous processing of screws from "loading to positioning to heating to cooling to unloading". It includes a multi-station dedicated quenching machine and an indexing plate. The specific structure and parameters comply with the technical agreement.

[0040] Multi-station dedicated quenching machine tool: Adopts a welded bed structure, and undergoes overall stress-relieving tempering treatment after welding, providing rust prevention, anti-magnetic properties, leak prevention, and electromagnetic interference resistance; the machine tool is equipped with three key components:

[0041] Lifting mechanism: used to adjust the position of induction heating. The transformer lifting stroke is 150mm, which can meet the local heating needs of screws of different lengths (15-90mm).

[0042] Transfer transmission mechanism: includes a transfer turntable with a diameter of φ350mm, with 16 stations. The workpiece quenching moving speed is 1m / min, and the maximum moving speed is 10m / min. It can realize the screws to rotate sequentially according to the rhythm.

[0043] Stainless steel water collection tank: The bottom plate and the surrounding plates of the water collection tank are made of stainless steel to collect coolant and prevent rust from contaminating the workpiece.

[0044] Workpiece drive: The workpiece rotation is driven by an AC geared motor, which supports frequency conversion speed regulation to ensure the rotational stability of screws of different specifications during heating;

[0045] Indexing plate: Supports workpiece installation in place recognition function (required by the technical agreement "equipment addition function"). It drives the workpiece to pass through each station in sequence through indexing and forward feeding. It is also linked with the sensor and cooling system to ensure accurate matching of the "positioning-heating-cooling" sequence.

[0046] Defective product handling: When a momentary power outage, power failure, or cooling system failure is detected, the mechanism automatically rejects defective products (performance requirements of the technical agreement "Dedicated Quenching Machine for Multi-Station Screws") to prevent defective products from flowing into the next stage.

[0047] 3. Induction heating system

[0048] Induction heating systems are used to achieve rapid localized heating of screws. They consist of three main subsystems: a MOSFET induction power supply system, an induction load system, and a power supply / workpiece cooling system. Parameters and structure strictly adhere to technical protocols.

[0049] MOSFET inductive power supply system:

[0050] Key parameters: Rated power 30KW, operating frequency above 100KHz, input capacity 36KVA, compatible with three-phase 380V 50Hz power supply.

[0051] Structural composition: It consists of a rectifier, a DC filter unit, an inverter power unit, and an RLC series resonant tank circuit (technical protocol "MOSFET high-frequency power supply working principle"). It adopts an FPGA fully digital control chip and has SPDM inverter power regulation technology, which can realize precise power regulation.

[0052] Safety protection: Built-in short circuit protection (accurate shutdown when the dual-turn sensor is short-circuited under 120% overload current, without damage to the module), undervoltage protection, electromagnetic shielding function of gate drive IC, and the cabinet temperature is controlled by air conditioning + water cooling of power devices to ensure stable power supply operation.

[0053] Cooling requirements: Use pure water for cooling, with an inlet water temperature of 5-35℃ (to avoid condensation on water-cooled components) and an inlet water pressure of 0.18-0.25Mpa (Technical Agreement "MOSFET High-Frequency Power Supply Operating Conditions");

[0054] Inductive load system:

[0055] Sensor: Manufactured according to the drawing requirements, and comes with one set of special sensors that meet the process requirements (technical agreement "Inductive Load System" requirements), and has a quick-change interface. The conductive busbar and the induction coil are connected with an axial limiting and longitudinal fine-tuning structure to ensure repeatability and positioning accuracy.

[0056] Adjustment mechanism: It has a two-dimensional adjustment mechanism with a horizontal adjustment range of 100mm. The position can be adjusted via touch screen to adapt to the heating position requirements of screws of different specifications.

[0057] Power supply / workpiece cooling system:

[0058] Key parameters: Power supply 380V / 3N~ / 50Hz, cooling capacity 26380kcal / h (8P), compressor power 7.5KW, operating current 27A, chilled water volume 4m³ 3 / h, the water pipe connector is DN50 (threaded);

[0059] Structural features: It adopts a high-efficiency turbo compressor, the evaporator is made of 304 stainless steel plate, the quenching liquid tank is equipped with a maximum liquid level protection device (to prevent overflow), and has a fault self-diagnosis alarm function (displaying fault content through graphics / characters).

[0060] Ease of operation: Supports one-button start-up; the electrical cooling system uses high-temperature resistant hoses for easy installation and maintenance.

[0061] 4. Automated loading, unloading, and sorting system

[0062] This system achieves automatic screw feeding, posture detection, and qualified product sorting without manual intervention. It includes a vibratory feeding mechanism, a position detection mechanism, a pneumatic workpiece unloading mechanism, a discharge conveyor mechanism, and a qualified product sorting mechanism. Parameters and functions comply with the technical agreement.

[0063] Vibratory feeding mechanism: includes a 650mm diameter vibratory plate, driven by an electromagnetic vibrator to discharge screws in a clockwise direction (as required by the technical agreement "Vibratory feeding mechanism"); the vibratory plate is equipped with a jamming and shortage alarm function. When material blockage or shortage occurs, feeding will be automatically stopped and an alarm will be sounded to avoid idle station operation;

[0064] Position detection mechanism: Located between the vibratory feeding mechanism and the indexing plate, it is used to detect the overlap state and position deviation of the screws (such as whether the screw posture meets the heating requirements). When an abnormality is detected, an alarm is immediately issued and the conveying is stopped to ensure that the screws entering the indexing plate have a qualified posture.

[0065] Material unloading and sorting: After processing, the pneumatic unloading mechanism of the workpiece sends the screws to the discharge conveyor through the falling channel. The qualified product sorting mechanism automatically judges and separates qualified products from defective products based on data such as "heating power, cooling time, and quenching fluid parameters" collected by the electrical control system. Defective products are directly rejected, and qualified products enter the subsequent process.

[0066] 5. Electrical control system

[0067] The electrical control system is the "central hub" for the coordinated operation of all modules in the equipment. The hardware selection and functions strictly adhere to the technical protocols, as detailed below:

[0068] Hardware configuration: PLC is Omron, touch screen is Weintek, air switch and relay are People Electric Appliance, servo motor is Zhishan servo motor, sensor and switching power supply are Omron, pneumatic components (air pump, cylinder, solenoid valve) are Airtac (technical agreement "electrical requirements").

[0069] Core functions:

[0070] Tiered password management: Three levels of permissions are set: administrator (full-function operation), engineer (parameter modification and adjustment), and operator (power-on use + parameter retrieval) to prevent unauthorized operations (technical agreement "product function characteristics").

[0071] Process parameter monitoring and setting: The upper and lower limits of heating time (unit: S), cooling time (unit: S), and output power (unit: KW) can be set, and power change graphs (such as the power curve for processing 5 workpieces) can be displayed; at the same time, the quenching fluid pressure (unit: MPa) and quenching fluid temperature (unit: ℃) are monitored, and an automatic alarm is triggered when the limits are exceeded (Technical Agreement "Product Function Features").

[0072] Data storage and traceability: It has a workpiece counting function, and historical processing data (including power, time, quantity, and number of defective products) is stored for at least 3 months (based on 4 pieces / second and 24 hours / day working conditions). It supports historical data query and facilitates quality traceability (Technical Agreement "Product Function Features").

[0073] Maintenance reminders: Regularly remind users to "clean the quenching fluid bubbles, check the quenching fluid concentration, and perform periodic sensor checks" to ensure the equipment is in a stable working condition (Technical Agreement "Product Functional Features").

[0074] Safety protection: Equipped with overcurrent, low water pressure, and over-temperature protection functions, and automatically alarms when the incoming line voltage exceeds ±7%; the equipment door is linked with the PLC, and the machine stops immediately when the door is opened in automatic operation mode, and can be operated step by step in maintenance and debugging mode (technical agreement "electrical requirements");

[0075] Communication and display: The equipment's PLC and HMI have Ethernet interfaces, support the HTTP communication protocol, and have a reserved MES interface (technical protocol "Electrical Requirements"); the top of the equipment is equipped with a three-color warning light (green solid on during normal operation, yellow solid on during standby, and red flashing during abnormality), and the front is equipped with an emergency stop button with a protective cover for accidental contact, so as to facilitate real-time monitoring of the equipment status.

[0076] Furthermore, all contents not described in detail in this specification are existing technologies known to those skilled in the art, and all electrical components mentioned in this document are powered by external power supply lines.

[0077] Working Principle: Based on the integrated electromechanical equipment 1, the vibratory feeding mechanism 6 (650mm diameter vibratory feeder clockwise discharge) in the automatic loading and sorting system orients and sorts the compatible M8-M12 screws with or without washers (length 15-90mm, maximum outer diameter of head flange gasket 40mm), and then conveys them to the indexing plate 9 of the multi-station dedicated quenching machine 2 in the multi-station collaborative mechanism. The indexing plate 9 ensures accurate screw positioning through the workpiece installation positioning recognition function, and then drives the screws to flow to each station in sequence according to the rhythm; in the induction heating system... A MOSFET induction power supply system 4 with a rated power of 30KW and a frequency of 100KHz or higher transmits energy to the quenching inductor 13 (with axial limiting and longitudinal fine-tuning structure) of the induction load system 5 via an RLC series resonant tank circuit. Simultaneously, the two-dimensional adjustment mechanism of the induction load system 5 (horizontal adjustment range 100mm, controlled by the touchscreen of the electrical control system 3) adjusts the position of the inductor 13 to achieve localized high-frequency rapid heating of the screw. After heating is completed, the power supply / workpiece cooling system 14 of the induction heating system (cooling capacity 26380kcal / h, cold water volume 4m³)... 3The automatic water spray cooling is started at / h; throughout the process, the electrical control system 3 (core of which is Omron PLC, Weintek touch screen, and Zhishan servo motor) monitors parameters such as heating time, cooling time, output power, quenching liquid pressure and temperature in real time. If an abnormality such as instantaneous power failure, power failure or cooling system failure is detected, the multi-station dedicated quenching machine tool 2 automatically rejects defective products; the processed screws are sent to the discharge conveyor mechanism 7 by the pneumatic unloading mechanism 10 of the automatic loading and unloading and sorting system through the falling channel 11. Then, the qualified product sorting mechanism 12 separates qualified and unqualified products based on the processing parameters. At the same time, the electrical control system 3 stores at least 3 months of historical processing data, implements hierarchical password management and issues regular maintenance reminders, realizing the automation, precision and continuous operation of local induction quenching of screws throughout the process.

[0078] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0079] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw local induction hardening apparatus characterized by comprising: The application relates to a complete integrated electromechanical device (1) which comprises a multi-station cooperative mechanism for realizing screw continuous quenching, an induction heating system, an automatic feeding and discharging and sorting system, and an electric control system (3) for controlling the cooperation of the systems; the multi-station cooperative mechanism is used for driving the screw to sequentially complete the feeding, positioning, heating, cooling, detecting and discharging processes; the induction heating system comprises an MOSFET induction power supply system (4) and an induction load system (5), the MOSFET induction power supply system (4) realizes local rapid heating of the screw by using high-frequency resonance technology; the automatic feeding and discharging and sorting system comprises a vibration material arranging mechanism for screw directional arrangement, a position detecting mechanism for detecting the screw posture, and a sorting mechanism for separating qualified and unqualified products according to the processing parameters; the complete integrated electromechanical device (1) is suitable for M8-M12 bolts with or without washers, and the workpiece length range is 15-90mm, and the maximum outer diameter of the head flange gasket is 40mm.

2. The screw partial induction hardening apparatus according to claim 1, characterized in that: The multi-station cooperative mechanism comprises a multi-station special quenching machine tool (2) and a dividing disc (9); the multi-station special quenching machine tool (2) adopts a welded bed body and comprises a lifting mechanism for adjusting the induction heating position, a transfer driving mechanism for driving the workpiece to flow, and a stainless steel water collecting tank for collecting the cooling liquid; the dividing disc (9) supports 8-64 equal divisions, drives the workpiece to sequentially pass through each station by forward feeding, and has a workpiece installation in-place identification function.

3. The screw partial induction hardening apparatus according to claim 2, characterized in that: In the lifting mechanism of the multi-station special quenching machine tool (2), the lifting stroke of the transformer is 150mm; the transfer driving mechanism comprises a transfer turntable with a diameter of phi 350mm, 16 stations are arranged, and the workpiece quenching moving speed is 1m / min; the workpiece rotation is driven by an alternating current speed reduction motor variable frequency drive, the multi-station special quenching machine tool (2) cooperates with the MOSFET induction power supply system (4), has high-frequency heating and water spraying cooling linkage control functions, and automatically removes defective products when detecting abnormalities.

4. The screw partial induction hardening apparatus of claim 1, wherein: The electric control system (3) adopts PLC, a touch screen and a servo motor to form a control core and has a hierarchical password management function; the heating time, the cooling time, the output power and the upper and lower limits of the quenching liquid parameters can be set, at least three months of historical processing data can be stored and regular maintenance can be reminded; overcurrent, low water pressure, over-temperature protection and incoming line voltage +7% alarm functions are arranged, an MES interface is reserved and an HTTP communication protocol is supported.

5. The screw partial induction hardening apparatus of claim 1, wherein: The MOSFET induction power supply system (4) has a rated power of 30KW, a working frequency of above 100KHz, an input capacity of 36KVA and is suitable for three-phase 380V 50Hz incoming lines; the MOSFET induction power supply system (4) comprises a rectifier, a direct current filter unit, an inverter power unit and an RLC series resonance tank circuit, adopts FPGA full digital control, has SPDM power regulating and short circuit protection functions, is cooled by pure water, the cooling water inlet temperature range is 5-35 DEG C, and the water inlet pressure is 0.18-0.25Mpa.

6. The screw partial induction hardening apparatus of claim 1, wherein: The induction load system (5) comprises a two-dimensional direction adjusting mechanism and a quenching inductor (13) with a quick replacement interface; the horizontal adjusting range of the two-dimensional direction adjusting mechanism is 100mm, and the adjusting is controlled by a touch screen; the conductive row and the induction coil of the quenching inductor (13) are provided with axial limiting and longitudinal fine adjusting structures to ensure the repeated positioning accuracy, and a set of special inductors are attached at random.

7. The screw partial induction hardening apparatus of claim 1, wherein: The vibration sorting mechanism is a vibration sorting and feeding mechanism (6), which comprises a vibration disc with a diameter of 650mm, the vibration disc is driven by an electromagnetic vibration driving screw to discharge clockwise in a predetermined direction, is provided with a material blocking and shortage alarm function, and is matched with the position detection mechanism to complete feeding.

8. The screw partial induction hardening apparatus of claim 1, wherein: The position detection mechanism is an overlapping and position detection mechanism (8), which is arranged between the vibration sorting and feeding mechanism (6) and the index plate (9), is used for detecting the overlapping state and position deviation of the screw, and sends out an alarm and suspends conveying when an abnormality is detected.

9. The screw partial induction hardening apparatus of claim 1, wherein: The automatic feeding and discharging and sorting system further comprises a workpiece pneumatic discharging mechanism (10), a falling channel (11) and a discharging conveying mechanism (7); the workpiece pneumatic discharging mechanism (10) sends the processed screw to the discharging conveying mechanism (7) through the falling channel (11), and the screw is conveyed to the qualified product sorting mechanism (12) by the discharging conveying mechanism (7). The induction load system (5) comprises a two-dimensional direction adjusting mechanism and a quenching inductor (13) with a quick replacement interface; the horizontal adjusting range of the two-dimensional direction adjusting mechanism is 100mm, and the adjusting is controlled by a touch screen; the conductive row and the induction coil of the quenching inductor (13) are provided with axial limiting and longitudinal fine adjusting structures to ensure the repeated positioning accuracy, and a set of special inductors are attached at random. The vibration sorting mechanism is a vibration sorting and feeding mechanism (6), which comprises a vibration disc with a diameter of 650mm, the vibration disc is driven by an electromagnetic vibration driving screw to discharge clockwise in a predetermined direction, is provided with a material blocking and shortage alarm function, and is matched with the position detection mechanism to complete feeding. The position detection mechanism is an overlapping and position detection mechanism (8), which is arranged between the vibration sorting and feeding mechanism (6) and the index plate (9), is used for detecting the overlapping state and position deviation of the screw, and sends out an alarm and suspends conveying when an abnormality is detected. The automatic feeding and discharging and sorting system further comprises a workpiece pneumatic discharging mechanism (10), a falling channel (11) and a discharging conveying mechanism (7); the workpiece pneumatic discharging mechanism (10) sends the processed screw to the discharging conveying mechanism (7) through the falling channel (11), and the screw is conveyed to the qualified product sorting mechanism (12) by the discharging conveying mechanism (7).

10. The screw partial induction hardening apparatus of claim 1, wherein: The induction heating system further comprises a quenching device (14) comprising a quenching inductor (13) and a power supply / workpiece cooling system; the quenching inductor (13) has a spray cavity and is driven to move up and down by a numerical control servo; the cooling system has a refrigeration capacity of 26380 kcal / h (8P) and a cold water flow of 4 m 3 / h and is provided with a quenching liquid parameter monitoring function.

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